The French winger sustained a thigh injury earlier this month in France's friendly against Spain.

He took part in Bayern's training on Friday, but Hitzfeld remains cautious over his availability against Mohamed Zidan's Hamburg.

"I can only say on Sunday whether I will select him for Hamburg match or not," the German tactician told the club's official website

Argentinean defender Martin Demichelis will definitely miss the game due to injury.

Bayern, who advanced to the UEFA Cup round of 16 at the expense of Aberdeen on Thursday, are on top of the Bundesliga table with 43 points.

Bremen lie second on 40 points, three ahead of third-placed Bremen.