The Scotland international has been out of action since half-way through last season after suffering a bowel condition, and has been ill.
However, with a thorough rehabilitation process underway, the combative midfielder is close to making a return to action and has been included in the Red Devils’ contingent for the European competition.
Sir Alex Ferguson is pleased with Fletcher’s progress and hopes he can call upon his countryman in the near future.
“Darren’s put a lot of weight back on,” the United manager told reporters, published in Sky Sports.
“He’s back to his normal weight from two or three years ago. It’s a case of wait and see.
“But Darren comes into the 25-man squad quite easily, without me having to leave others out because we have a number of players who we don’t need to register because of the time they’ve spent with us as an academy player.
“That’s an advantage. He’s training well every day and played really well the other night for the under-21s,” Ferguson revealed.
By Gareth McKnight