Olympique Marseille coach Didier Deschamps admits he spies a weakness at the back for Arsenal.

Victory would seal Arsenal's path to the last 16 of the Champions League and Deschamps admits his team are well aware of the threat Arsène Wenger's side will pose.

"Arsène Wenger has said that maybe the game will be a bit more difficult for Arsenal this time," he said.

"They put in a great performance to score five goals against Chelsea, who are contenders for the title. They could have been 2-0 behind after 15 minutes, so there's a great attacking match in front of us.

"Maybe everything is centralised on Van Persie at the moment because he is scoring a lot of goals but the trio they have up front is really strong. The midfield is as well.

"They concede some goals at the back but still this team has really strong potential."