Fletcher made his first appearance for United this season in the 1-1 Champions League draw with Benfica.
“It’s great to be back involved in the squad,” Fletcher told Sky Sports.
“I know the lads have been playing fantastically well at the beginning of the season, some great football and some fantastic results, so it is going to be difficult.
“All you can do is do your best when you’re given the opportunity and try and stay in the team.
“The manager spoke about once the Champions League started the squad game would come into play and that was proved tonight.
“He made six or seven changes, everyone who came in looked comfortable and there was an eye towards the big game on Sunday which makes competition for places good.”
