Roberto Di Matteo, the interim Chelsea manager, is pondering the biggest selection dilemma of his managerial career as he plots Barcelona's downfall in Chelsea's latest Champions League semi-final.

Di Matteo has to decide whether to stick with Didier Drogba for tonight's first leg at Stamford Bridge or recall Fernando Torres.

Based on current form and previous meetings with Barca, Drogba is the obvious choice but that would also be the case for Saturday's Barclays Premier League game at Arsenal and Tuesday's return at Camp Nou.

Di Matteo has given almost equal game time to Drogba and Torres since he took charge and, after the former started Sunday's FA Cup semi-final thrashing of Tottenham Hotspur, it would appear something has to give.

However, Drogba, who has long been used to being top dog at Stamford Bridge, has accepted that rotation is a fact of life for the rest of this season.

"It's new for me, but there's nothing bad about it," he said. "The most important thing is for the team to win games and to go forward.

"Of course, I would like to play more, but I think the other players would like to play more as well, so I can't complain."

Barcelona's Dani Alves, meanwhile, has claimed Chelsea blew their chance to reach the 2009 final because of fear and not because of Norwegian referee Tom Henning Ovrebo.

Ahead of tonight's game between the two sides, Alves has reopened wounds from the controversial tie three years ago, when Chelsea claimed they were robbed of a final place.

Chelsea's then-manager Guus Hiddink claimed Ovrebo's performance was "the worst I have ever seen" by a referee, and Drogba and Jose Bosingwa were both sanctioned for protesting at the final whistle.

But Alves claimed: "There is no doubt that was the hardest game we've played, but a team with a man advantage playing at home and winning should have attacked us more.

"People say Chelsea should have won but for the referee, but that is not our problem. We were there to play football, to compete and try to get to the final. Chelsea did not reach the final because of fear."