04/09/2014 03:58 BST | Updated 04/09/2014 04:59 BST

US Open: Andy Murray Beaten By Gutsy Novak Djokovic

DON EMMERT via Getty Images
Andy Murray of Great Britain reacts to a point against Novak Djokovic of Serbia during their US Open 2014 men's quarterfinals match at the USTA Billie Jean King National Center September 3, 2014 in New York. AFP PHOTO/Don Emmert (Photo credit should read DON EMMERT/AFP/Getty Images)

Andy Murray's US Open campaign ended with a gruelling four-set defeat by Novak Djokovic in the quarter-finals.

It was past 1am in New York when the world number one finally finished off a 7-6 (7/1) 6-7 (1/7) 6-2 6-4 victory after three hours and 32 minutes to move forward to a semi-final against Japan's Kei Nishikori.

The considerable consolation for Murray was that he played his best tennis since back surgery almost a year ago and looks close to the form that brought him two grand slam titles.

andy murray novak djokovic

Djokovic is on course to win his second successive Grand Slam

Djokovic said: "We both gave our best. At times the tennis was not that nice, we made a lot of unforced errors, but it was due to the very physical battle in the opening two-and-a-half sets.

"I didn't expect any less knowing I was going to face Andy. The last five times we played, it was always over three or four hours. I'm very glad to get through to another semi-final."

Djokovic beats Murray