Manchester United boss Jose Mourinho is demanding total loyalty from his players.
The Sun says he told his United players in the final weeks of the season: Back me or leave.
Mourinho grew increasingly frustrated with his team's inconsistent performances as the campaign drew to a close.
It prompted a fiery address to the misfiring stars, in front of first-team staff, telling them that anyone who wanted to leave the club could go.
Mourinho also made it clear he was doing things his way whether they liked it or not — and that he was there to succeed.
He will be backed again in the transfer market, but the club want to see him get the best out of big-name signings like Paul Pogba and Alexis Sanchez — something he has so far failed to do.