Fletcher has not featured for United since December due to a chronic bowel condition.
Ferguson insists the 28-year-old Scotland international will given ‘every possible chance’ to prove his fitness.
Ferguson told the club’s official website, when asked about a possible comeback for Fletcher: “We’ll wait and see about that. Obviously the boy is trying very hard to get back to his level.
“It’s not going to be easy but we’ll give him every possible chance and we’ll see how it goes.
“He kept himself active towards the end of the season when he replaced Paul Scholes as reserves coach when Scholes decided to come back as a player.
“Darren’s a terrific lad and we all hope he can come back.”
