PATRIK STOLLARZ via Getty Images
Bayern Munich coach Pep Guardiola has promised his players "heads will roll" when he discovers who is leaking the team's tactics.
Bayern defeated Borussia Dortmund 3-0 at the Westfalenstadion on Saturday to extend their unbeaten Bundesliga run to 38 games, but Guardiola is digging to unearth a mole within the camp.
German tabloid Bild quote Guardiola as telling his players: "It does not matter who it is, heads will roll. I will throw him out. He will not play under me again."
Borussia vs Bayern
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Bayern Munich's Croatian striker Mario Mandzukic (R) and Dortmund's midfielder Kevin Grosskreutz clash during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
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ALTERNATIVE CROP - Bayern Munich's Croatian striker Mario Mandzukic (R) and Dortmund's midfielder Kevin Grosskreutz clash during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(03 of52)
DORTMUND, GERMANY - NOVEMBER 23: Mario Mandzukic of Munich goes head to head with Kevin Grosskreutz of Dortmund during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Lars Baron/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(04 of52)
DORTMUND, GERMANY - NOVEMBER 23: Thomas Mueller of Munich challenges Sokratis Papastathopoulos of Dortmund during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(05 of52)
DORTMUND, GERMANY - NOVEMBER 23: Thomas Mueller of Munich challenges Sokratis Papastathopoulos of Dortmund during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(06 of52)
DORTMUND, GERMANY - NOVEMBER 23: Mario Mandzukic of Munich volleys towards goal during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Lars Baron/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(07 of52)
DORTMUND, GERMANY - NOVEMBER 23: Thomas Mueller of Munich challenges Sokratis Papastathopoulos of Dortmund during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(08 of52)
DORTMUND, GERMANY - NOVEMBER 23: Mario Mandzukic of Munich challenges Marco Reus of Dortmund during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(09 of52)
DORTMUND, GERMANY - NOVEMBER 23: Marco Reus of Dortmund is challenged by Rafinha of Munich during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(10 of52)
DORTMUND, GERMANY - NOVEMBER 23: Jerome Boateng of Munich controls the ball challenged by Marco Reus of Dortmund during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Lars Baron/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(11 of52)
DORTMUND, GERMANY - NOVEMBER 23: Marco Reus of Dortmund challenges for the ball with Rafinha of Munich during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Lars Baron/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(12 of52)
DORTMUND, GERMANY - NOVEMBER 23: Mario Mandzukic of Munich goes head to head with Kevin Grosskreutz of Dortmund during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Lars Baron/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(13 of52)
DORTMUND, GERMANY - NOVEMBER 23: Robert Lewandowski of Dortmund is challenged by Dante of Munich during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Lars Baron/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(14 of52)
DORTMUND, GERMANY - NOVEMBER 23: Thomas Mueller of Munich is challenged by Eric Durm of Dortmund during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(15 of52)
DORTMUND, GERMANY - NOVEMBER 23: EDITORS NOTE: THIS IMAGE WAS CREATED WITH A STAR FILTER) Juergen Klopp the Dortmund manager looks on prior to the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Lars Baron/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(16 of52)
DORTMUND, GERMANY - NOVEMBER 23: EDITORS NOTE: THIS IMAGE WAS CREATED WITH A STAR FILTER) Juergen Klopp the Dortmund manager looks on prior to the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Lars Baron/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(17 of52)
DORTMUND, GERMANY - NOVEMBER 23: EDITORS NOTE: THIS IMAGE WAS CREATED WITH A STAR FILTER) Juergen Klopp the Dortmund manager looks on prior to the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Lars Baron/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(18 of52)
DORTMUND, GERMANY - NOVEMBER 23: Robert Lewandowski of Dortmund challenges Jerome Boateng of Munich during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Lars Baron/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(19 of52)
DORTMUND, GERMANY - NOVEMBER 23: Thomas Mueller of Munich is challenged by Eric Durm of Dortmund during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
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Dortmund's Polish midfielder Jakub Blaszczykowski (L) and Bayern Munich's Austrian midfielder David Alaba vie for the ball during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(21 of52)
Dortmund's Polish midfielder Jakub Blaszczykowski (L) and Bayern Munich's Austrian midfielder David Alaba vie for the ball during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(22 of52)
Bayern Munich's Dutch midfielder Arjen Robben (L) and Dortmund's Polish midfielder Jakub Blaszczykowski vie for the ball during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(23 of52)
DORTMUND, GERMANY - NOVEMBER 23: Marco Reus of Dortmund is challenged by Rafinha of Munich during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(24 of52)
DORTMUND, GERMANY - NOVEMBER 23: Mario Mandzukic of Munich challenges Marco Reus of Dortmund during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(25 of52)
DORTMUND, GERMANY - NOVEMBER 23: Mario Goetze of Munich gives the thumbs up during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(26 of52)
Dortmund's Polish midfielder Jakub Blaszczykowski (L) and Bayern Munich's Austrian midfielder David Alaba vie for the ball during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(27 of52)
DORTMUND, GERMANY - NOVEMBER 23: Kevin Grosskreutz of Dortmund reacts after a confrontation with Mario Mandzukic of Munich during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
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Dortmund's defender Manuel Friedrich plays the ball during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(29 of52)
DORTMUND, GERMANY - NOVEMBER 23: Mario Goetze of Munich comes on as a substitute for Mario Mandzukic during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(30 of52)
Bayern Munich's Spanish head coach Pep Guardiola reacts during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(31 of52)
DORTMUND, GERMANY - NOVEMBER 23: Robert Lewandowski of Dortmund is closed down by goalkeeper Manuel Neuer of Munich during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Lars Baron/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(32 of52)
DORTMUND, GERMANY - NOVEMBER 23: Mario Goetze of Munich looks on during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(33 of52)
DORTMUND, GERMANY - NOVEMBER 23: Mario Goetze of Munich looks on during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(34 of52)
Bayern Munich's Spanish head coach Pep Guardiola reacts during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(35 of52)
Dortmund's head coach Juergen Klopp (R) reacts during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(36 of52)
Bayern Munich's defender Jerome Boateng (R) and Dortmund's striker Marco Reus vie for the ball during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(37 of52)
Bayern Munich's defender Jerome Boateng (R) and Dortmund's Polish striker Robert Lewandowski vie for the ball during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(38 of52)
Bayern Munich's defender Jerome Boateng (R) and Dortmund's Polish striker Robert Lewandowski vie for the ball during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(39 of52)
Dortmund's Polish midfielder Jakub Blaszczykowski (R) ,Bayern Munich's goalkeeper Manuel Neuer (L) and Bayern Munich's Brazilian defender Dante (C) vie for the ball during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(40 of52)
Bayern Munich's defender Jerome Boateng (R) and Dortmund's Polish striker Robert Lewandowski vie for the ball during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(41 of52)
Bayern Munich's defender Jerome Boateng (R) and Dortmund's Polish striker Robert Lewandowski vie for the ball during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(42 of52)
Bayern Munich's midfielder Toni Kroos (R) and Dortmund's defender Manuel Friedrich vie for the ball during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
FBL-GER-BUNDESLIGA-DORTMUND-BAYERN MUNICH(43 of52)
Bayern Munich's Croatian striker Mario Mandzukic (R)and Dortmund's midfielder Kevin Grosskreutz clash during the German first division Bundesliga football match between Borussia Dortmund and Bayern Munich in Dortmund, western Germany, on November 23, 2013. AFP PHOTO / PATRIK STOLLARZ RESTRICTIONS - DFL RULES TO LIMIT THE ONLINE USAGE DURING MATCH TIME TO 15 PICTURES PER MATCH. FOR FURTHER QUERIES PLEASE CONTACT THE DFL DIRECTLY AT + 49 69 650050. (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(44 of52)
DORTMUND, GERMANY - NOVEMBER 23: Goalkeeper Manuel Neuer of Munich celebrates the opening goal scored by Mario Goetze during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Lars Baron/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(45 of52)
DORTMUND, GERMANY - NOVEMBER 23: Mario Goetze of Munich gives the thumbs up during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(46 of52)
DORTMUND, GERMANY - NOVEMBER 23: Mario Goetze (2ndL) of Munich celebrates with team mates after scoring the opening goal during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(47 of52)
DORTMUND, GERMANY - NOVEMBER 23: Mario Goetze (2ndL) of Munich celebrates with team mates after scoring the opening goal during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
Borussia Dortmund v FC Bayern Muenchen - Bundesliga(48 of52)
DORTMUND, GERMANY - NOVEMBER 23: Thomas Mueller of Munich is mobbed by team mates after scoring his team's third goal during the Bundesliga match between Borussia Dortmund and FC Bayern Muenchen at Signal Iduna Park on November 23, 2013 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images) (credit:Getty Images)
Arjen Robben(49 of52)
Bayern's Arjen Robben, below, falls down during the German first division Bundesliga soccer match between BvB Borussia Dortmund and Bayern Munich in Dortmund, Germany, Saturday, Nov. 23, 2013. (AP Photo/Frank Augstein) (credit:AP)
Manuel Friedrich, Mario Mandzukic, Arjen Robben(50 of52)
From right, Dortmund's Manuel Friedrich, Bayern's Mario Mandzukic of Croatia and Arjen Robben challenge for the ball during the German Bundesliga soccer match between Borussia Dortmund and Bayern Munich in Dortmund, Germany, Saturday, Nov. 23, 2013. (AP Photo/Martin Meissner) (credit:AP)
Arjen Robben, Nuri Sahin(51 of52)
Bayern's Arjen Robben of the Netherlands, up, jumps for the ball in front of Dortmund's Nuri Sahin during the German Bundesliga soccer match between Borussia Dortmund and Bayern Munich in Dortmund, Germany, Saturday, Nov. 23, 2013. (AP Photo/Martin Meissner) (credit:AP)
Sokratis, Arjen Robben(52 of52)
Dortmund's Sokratis, left, and Bayern's Arjen Robben challenge for the ball during the German first division Bundesliga soccer match between BvB Borussia Dortmund and Bayern Munich in Dortmund, Germany, Saturday, Nov. 23, 2013. (AP Photo/Frank Augstein) (credit:AP)
Tactics were uncovered by the press ahead of the Klassiker and Bayern chief executive Karl-Heinz Rummenigge confirmed the Tinker Tailor Soldier Spy-esque situation.
"We will obviously not bring in the NSA [National Security Agency] to find out who it is," Rummenigge told Sky television. "But I advise him to stop doing it or he will have a serious problem not only with Pep Guardiola, but also the entire club."
Bayern are seven points clear of Dortmund and four ahead of second-placed Bayer Leverkusen.