The 22 year-old picked up a leg injury during Saturday's 1-1 draw with   Birmingham, which left Arsenal   manager Arsène Wenger sweating over the midfielder's fitness for tomorrow's   meeting with the Spanish and European Champions. Fabregas is desperate to play against the team with whom he spent six years   before moving to London but he may now miss out after he failed to appear   alongside his team-mates at London Colney this morning.  Related ArticlesBendtner confident of starring on big stageThierry Henry the inventive InvincibleBergkamp backs visionLionel Messi 'as good as Maradona'Messi has world at his feetArshavin Arsenal's answer to MessiFabregas is Arsenal's leading scorer this season with a 18 goals in 35 matches   from central midfield, with Wenger this season playing the Catalan in a more   advanced, free roaming role. Wenger had expressed confidence Fabregas would recover sufficiently following   intensive treatment on the injury but his non-appearance at training hints   that all is not well with the Spain international. Emmanuel Eboué could come into the Arsenal side to stiffen a midfield that   will be required to help out the defence against the devastating Lionel   Messi and former Arsenal great Thierry Henry. Barcelona will be without midfielder Andres Iniesta because of injury but   defenders Eric Abidal and Gerard Pique should have recovered from injury to   play. 
            Source: Telegraph