Arsenal's Laurent Koscielny (L) is challenged by Barcelona's Lionel Messi during their Champions League soccer match at Nou Camp stadium in Barcelona March 8, 2011. REUTERS/Albert Gea (SPAIN - Tags: SPORT SOCCER)
Barcelona's Lionel Messi (R) is challenged by Arsenal's Abou Diaby during their Champions League soccer match at Nou Camp stadium in Barcelona March 8, 2011. REUTERS/Albert Gea (SPAIN - Tags: SPORT SOCCER)
Barcelona's Lionel Messi (L) beats Arsenal's goalkeeper Manuel Almunia to score a goal during their Champions League soccer match at Nou Camp stadium in Barcelona March 8, 2011. REUTERS/Albert Gea (SPAIN - Tags: SPORT SOCCER)