United's lead at the top of the Premier League table has been whittled down to just one point following back-to-back defeats by Liverpool and Fulham.
The reigning champions still have a game in hand over their title rivals, but Fletcher is disappointed there is not an immediate chance to respond to the successive losses.
The international break means United must wait until Sunday 5th April before their next game against Aston Villa, with Fletcher currently preparing for Scotland's World Cup qualifiers against Holland and Iceland.
Fletcher admits it is easy to talk about bouncing back to form, but wants the United players to prove their intentions on the pitch.
"We would have liked another game straight away to respond to a couple of difficult games, which are hopefully just a setback," said Fletcher on Sky Sports News.
"It's easy to talk about it, but you've got to go out on to the pitch and prove it is only a setback.
"We would have been desperate for another league game, but unfortunately the internationals have come about.
"Liverpool would have been wanting the league to continue really and not wanting the international break, so you never know, it might be something that we just have to deal with.
"I'm sure we'll be back to winning ways, we've got to be."
He added: "It's easy for me to say it's only a blip, but we've got to go out on to the park and show it's only a blip.
"I think it's easy talking about it, it's hard to go and do it. We'll all be desperate to go out and show when we get back that it is only a blip.
"As I say, it's easier talking than it is to go and produce results."