Darren Fletcher says Manchester United can exploit Chelsea's transition from ruthless efficiency to panache Fletcher, the United midfielder, recognises his side will face a new type of test to previous years in order to get a result at Stamford Bridge on Sunday and is impressed by the rapid transition under the Italian coach, Roberto Di Matteo. "It is a different Chelsea side now," said Fletcher. It used to be a big strong physical side, playing against Michael Ballack, Claude Makélélé and Frank Lampard in midfield and Didier Drogba up front, whereas now you are facing more like Barcelona players, the small intricate players who get in the pockets behind you and they play killer passes. Fletcher is easing back to his best after his spell out with a bowel condition, and facing Chelsea would be a significant next step. "If I am chosen, it would be the biggest game of my comeback," he said. I am fully aware that I am still on my way back and the more games I get, the better it will be for me. I will have to be patient. I am back quicker than I expected. I've always appreciated how fortunate I was to play this game, but I think you appreciate it more after going through something like I have. United are still assessing the seriousness of Shinji Kagawa's knee injury after he was substituted at half-time against Braga on Tuesday. Kagawa, who wanted to play on in the 3-2 victory, is confident the knock is minor but United are taking no chances and will await the results of further tests on Wednesday to discover the extent of the problem. Manager Sir Alex Ferguson said: "Kagawa twisted his knee, but we don't know the extent of it at the moment."