Manchester United assistant Michael Carrick admits that uncertainty is tough for players to handle right now.

Footballers in England are uncertain if and when the Premier League will return.

Some European leagues are canceled, while the Bundesliga gets back to action on Saturday May 16.

"That's the biggest challenge: not really having a return date," said Carrick, the former United midfielder, during the MUTV Group Chat on the club's official website.

"That's why we've tried to gradually increase training and we're just giving ourselves the best chance to be ready, if, and when, we start.

"It's the same as everyone - it's not just about us and the players; it's about everyone, in every walk of life. Everyone has got jobs to go back to and not knowing is the biggest issue. You can't plan and you're not sure what's next.

"It can be difficult. We're just trying to make the best of it and the lads have been great with everything we've asked them to do. It's not easy and they've had to take the responsibility themselves and train on their own."