Arsenal boss Arsene Wenger has confirmed that Andrey Arshavin and Alex Song are major injury doubts ahead of next week's Champions League clash with FC Porto.
Arshavin aggravated an existing hamstring problem while fellow midfielder Song took a blow to the knee during Wednesday's 1-0 Premier League victory over Liverpool.
Both are rated doubtful for the first leg of the last 16 tie which takes place in Portugal on Wednesday.
"I hope (Song) will be available but it is not sure," Wenger told Arsenal TV. "We have to assess Arshavin too."
Meanwhile, midfielder Samir Nasri will be fit to play despite suffering with a head injury against the Reds.
Croatia striker Eduardo will also return from a hamstring injury which has forced him to miss the last three games.