Ole Gunnar Solskjaer has told Manchester United's players they risk being omitted from the club's pre-season tour if they report back unfit.
United manager Solskjaer has repeatedly expressed his frustration at the fitness levels of his players since he took over in December.
Solskjaer is of the view that United have to be able to match their rivals physically if they are to close the huge gap between themselves and the top of the Premier League table next season.
United are 29 points behind leaders Manchester City going into the final round of league matches on Sunday, with Solskjaer suggesting that even next season, United are unlikely to mount a title challenge.
He feels the key to improvement is to make a fast start and build momentum, which is why he wants his players to return for pre-season training on July 1 in their best possible shape.
The United manager is focusing on making sure his players are ready, whatever their schedule.
- 'It's not a threat' -
"The players have all got their programmes to do over the summer. We expect them to be ready to go on July 1 when we start," he said.
"We're not going to use the first 10 days to build them up. They should be ready to go. We've got a longer summer break than any of the other challengers and we need to use that as an advantage.
"Yes, we are behind what we've been used to. We've had that for some years now. For me, I look at it as a great chance to start rebuilding."