AC Milan coach Massimiliano Allegri was delighted with his team's patient approach after they defeated Barcelona 2-0 in the clubs' Champions League round-of-16 first leg.

Former Portsmouth players Kevin-Prince Boateng and Sulley Muntari scored to give the Rossoneri the advantage ahead of the return leg at the Camp Nou in three weeks, the perfect fillip ahead of Sunday's Milan derby.

muntari boateng

Boateng and Muntari were the heroes of the night

And Allegri stressed the importance of concentrating on domestic matters.

"We haven't done anything yet," he said on www.acmilan.com after the game at the San Siro. "We have to leave it there now as we have the derby and we have to recharge our batteries immediately.

"I'm very happy with what the players have done and we should enjoy this evening and start focusing on the derby tomorrow."

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  • AC Milan's players celebrate their 2-0 win at the end of a Champions League round of 16, first leg soccer match against FC Barcelona at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AP Photo/Felice Calabro')

  • AC Milan midfielder Kevin Prince Boateng, of Ghana, celebrates at the end of the Champions League round of 16, first leg soccer match against Barcelona, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Luca Bruno)

  • AC Milan's Sulley Muntari, left, celebrates with his teammate Kevin Prince Boateng after scoring at the end of their Champions League round of 16, first leg soccer match against Barcelona, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Fabio Ferrari, Lapresse)

  • AC Milan defender Philippe Mexes jumps higher than Barcelona's Pedro during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Fabio Ferrari, Lapresse)

  • AC Milan's Kevin Prince Boateng, left, and his teammate Sulley Muntari celebrate at the end of their Champions League round of 16, first leg soccer match against Barcelona, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Fabio Ferrari, Lapresse)

  • Barcelona midfielder Andres Iniesta is tackled by AC Milan midfielder Kevin Prince Boateng, of Ghana, right, during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • Barcelona forward Lionel Messi, of Argentina, is tackled by AC Milan midfielder Massimo Ambrosini during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • Barcelona forward Lionel Messi, of Argentina, walks on the pitch during the Champions League round of 16, first leg soccer match between AC Milan and Barcelona, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Luca Bruno)

  • Barcelona forward Lionel Messi, of Argentina, looks down during the Champions League round of 16, first leg soccer match between AC Milan and Barcelona, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Luca Bruno)

  • Barcelona forward Lionel Messi, of Argentina, reacts during the Champions League round of 16, first leg soccer match between AC Milan and Barcelona, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Luca Bruno)

  • Sulley Muntari

    AC Milan's Sulley Muntari, right, of Ghana, celebrates after scoring during a Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Felice Calabro')

  • AC Milan midfielder Kevin Prince Boateng, of Ghana, celebrates at the end of the Champions League round of 16, first leg soccer match against Barcelona, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Luca Bruno)

  • Sulley Muntari

    AC Milan's Sulley Muntari, of Ghana, celebrates after scoring during a Champions League round of 16, first leg soccer match against Barcelona, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Felice Calabro')

  • AC Milan midfielder Kevin Prince Boateng, of Ghana, celebrates at the end of the Champions League round of 16, first leg soccer match against Barcelona, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Luca Bruno)

  • AC Milan midfielder Kevin Prince Boateng, of Ghana, celebrates with his teammate Sulley Muntari, of Ghana, right, at the end of the Champions League round of 16, first leg soccer match against Barcelona, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Luca Bruno)

  • AC Milan midfielder Kevin Prince Boateng, of Ghana, celebrates with his teammate Sulley Muntari, of Ghana, right, at the end of the Champions League round of 16, first leg soccer match against Barcelona, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Luca Bruno)

  • AC Milan midfielder Kevin Prince Boateng, of Ghana, celebrates with his teammate Sulley Muntari, of Ghana, right, at the end of the Champions League round of 16, first leg soccer match against Barcelona, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Luca Bruno)

  • Kevin-Prince Boateng

    AC Milan's Kevin-Prince Boateng celebrates at the end of a Champions League round of 16, first leg soccer match against FC Barcelona at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Felice Calabro')

  • AC Milan midfielder Kevin Prince Boateng, of Ghana, celebrates with his teammate Sulley Muntari, of Ghana, right, at the end of the Champions League round of 16, first leg soccer match against Barcelona, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Luca Bruno)

  • AC Milan's players celebrate their 2-0 win at the end of a Champions League round of 16, first leg soccer match against FC Barcelona at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Felice Calabro')

  • AC Milan midfielder Kevin Prince Boateng, of Ghana, celebrates with his teammate Sulley Muntari, of Ghana, at the end of the Champions League round of 16, first leg soccer match against Barceloa, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Luca Bruno)

  • Sulley Muntari

    AC Milan's Sulley Muntari, second right, of Ghana, is hugged by his teammates Riccardo Montolivo, left, and Kevin Constant as Barcelona's Xavi Hernandez walks past them, after he scored during a Champions League round of 16, first leg soccer match against FC Barcelona at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Felice Calabro')

  • Sulley Muntari

    AC Milan's Sulley Muntari, of Ghana, celebrates after scoring during a Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. AC Milan won 2-0. (AP Photo/Felice Calabro')

  • AC Milan forward Stephan El Shaarawy, left, celebrates after his teammate Sulley Muntari scored during the Champions League round of 16, first leg soccer match between AC Milan and Barcelona, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • AC Milan midfielder Sulley Muntari, of Ghana, celebrates after scoring his side's second goal during the Champions League round of 16, first leg soccer match between AC Milan and Barcelona, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • Sulley Muntari

    AC Milan's Sulley Muntari, left, of Ghana, scores past Barcelona defender Carles Puyol during a Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Felice Calabro')

  • AC Milan midfielder Sulley Muntari, of Ghana, left, scores his side's scond goal during the Champions League round of 16, first leg soccer match between AC Milan and Barcelona, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • Kevin-Prince Boateng, Stephan El Shaarawy

    AC Milan's Kevin-Prince Boateng, left, is hugged by teammate Stephan El Shaarawy, after scoring during their Champions League round of 16, first leg soccer match against Barcelona, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Felice Calabro')

  • Kevin-Prince Boateng

    AC Milan's Kevin-Prince Boateng celebrates after scoring during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. (AP Photo/Felice Calabro')

  • Kevin-Prince Boateng

    AC Milan's Kevin-Prince Boateng celebrates after scoring during the Champions League round of 16, first leg soccer match against FC Barcelona at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Felice Calabro')

  • Kevin-Prince Boateng

    AC Milan's Kevin-Prince Boateng, left, celebrates after scoring during the Champions League round of 16, first leg soccer match between AC Milan and Barcelona, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Felice Calabro')

  • AC Milan midfielder Kevin Prince Boateng, of Ghana, left, scores during the Champions League round of 16, first leg soccer match against Barceloa, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • AC Milan midfielder Kevin Prince Boateng, of Ghana, center, and Barcelona midfielder Xavi Hernandez vie for the ball during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • AC Milan midfielder Kevin Prince Boateng, of Ghana, center, celebrates past Barcelona midfielder Sergio Busquets, left, and goalie Victor Valdes after scoring during the Champions League round of 16, first leg soccer match against Barceloa, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • Barcelona forward Lionel Messi, of Argentina, left, is challenged by AC Milan midfielder Riccardo Montolivo during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • AC Milan midfielder Kevin Prince Boateng, of Ghana, celebrates after scoring during the Champions League round of 16, first leg soccer match against Barceloa, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • Kevin-Prince Boateng, Philippe Mexes

    AC Milan's Kevin-Prince Boateng, left, celebrates with teammate Philippe Mexes, of France, after scoring during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. (AP Photo/Felice Calabro')

  • Kevin-Prince Boateng

    AC Milan's Kevin-Prince Boateng, left, celebrates with teammates Philippe Mexes and Riccardo Montolivo, right, after scoring during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Felice Calabro')

  • Barcelona forward Lionel Messi, of Argentina, center, is challenged by AC Milan midfielder Massimo Ambrosini, left, and Riccardo Montolivo during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • Giampaolo Pazzini

    AC Milan's Giampaolo Pazzini, top, jumps for the ball during their Champions League round of 16, first leg soccer match against FC Barcelona at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Felice Calabro')

  • Lionel Messi, Riccardo Montolivo

    FC Barcelona forward Lionel Messi, right, of Argentina, is chased by AC Milan's Riccardo Montolivo during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Felice Calabro')

  • AC Milan midfielder Kevin Prince Boateng, of Ghana, third left, scores during the Champions League round of 16, first leg soccer match against Barceloa, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • Cesc Fabregas, Kevin-Prince Boateng

    FC Barcelona's Cesc Fabregas, bottom, is fouled by AC Milan's Kevin-Prince Boateng during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Wednesday, Feb. 20, 2013. (AP Photo/Felice Calabro')

  • Kevin-Prince Boateng, Sergio Busquets

    AC Milan's Kevin-Prince Boateng, foreground, is challenged by FC Barcelona's Sergio Busquets during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Felice Calabro')

  • Barcelona midfielder Andres Iniesta, second right, is challenged by AC Milan midfielder Riccardo Montolivo, right, and AC Milan defender Ignazio Abate as AC Milan midfielder Kevin Prince Boateng, of Ghana, looks at them, during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • Barcelona's Dani Alves, right, and AC Milan's Sulley Muntari jump for the ball during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Fabio Ferrari, Lapresse)

  • AC Milan forward Stephan El Shaarawy runs with the ball past Barcelona defender Daniel Alves, of Brazil, during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • Barcelona defender Daniel Alves, of Brazil, left, and AC Milan midfielder Massimo Ambrosini vie for the ball during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • Barcelona forward Lionel Messi, of Argentina, right, is challenged by AC Milan midfielder Riccardo Montolivo during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Alfredo Falcone, Lapresse)

  • AC Milan coach Massimiliano Allegri gestures during the Champions League round of 16, first leg soccer match between Barcelona and AC Milan, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Luca Bruno)

  • Barcelona forward Lionel Messi, of Argentina, right, is challenged by AC Milan defender Philippe Mexes, of France, during their Champions League round of 16, first leg soccer match, at the San Siro stadium in Milan, Italy, Wednesday, Feb. 20, 2013. (AP Photo/Alfredo Falcone, Lapresse)