Chelsea striker Didier Drogba is an injury doubt for their Champions League second-leg clash at Barcelona.

After their 0-0 draw at Arsenal, Di Matteo refused to be drawn on whether Drogba would be fit for Tuesday's Champions League semi-final after missing the game with a knee injury.

He said: "At this moment of time, I'm not sure, we will have to assess all players on Sunday.

"He's got an injury on his knee, so it's whether the progression on the injury is going to be quick enough."