Arsenal could be without midffielder Abou Diaby as they prepare to kick of their champions league. Gruop H campaign at home against Braga on wednesday. Diaby pick picked up an injury in the 4-1 win over Bolton on saturday and Arsenal are waiting for the results of a scan.

The Gunners are already likely to be missing injured trio Nicklas Bendter, Theo Walcott and Robin Van persie. Braga who beat Celtic and sevilla to reach the Group stage, are without banned duo Elderson and Leandro Salino. Arsenal boss Arsene Wenger has warned his players to guard against complacency with the Gunners expected to easy through a group that also contains Shaktar Donetsk and partizan Balgrade. For as, a win on wednesday night is vital, becouse I believe the Group is much more diffcult than people expect it to be, said wenger. Braga finished in front of porto last year - played against porto and know they are a good side. Also they have just kicked Sevilla out in the play-offs. Shaktar Donetsk are one of the best European sides, that is why I believe it is very important wi start well at home. Arsenal should also welcome back rester full-backs Bacary Sagna and Geal Clichy as well as centre-back Thomas Vermaelen, who should return after a minor Achilles problem.