The United and Scotland international midfielder returned to training on Thursday and although he won't be fit enough for the home match against Blackburn this weekend it is hoped that he could be available for selection for the match against Chelsea at Stamford Bridge on 8th November.
"Darren Fletcher started training yesterday," United boss Sir Alex Ferguson has said.
"That was his first day back training with the first team.
"He won't be fit for tomorrow but hopefully we'll get him ready for the Chelsea game.
"He'll get 10 days' training before that."