Manchester United striker Marcus Rashford may not play until the end of October.
Rashford decided to have surgery on a shoulder injury.
The 23-year-old had a scan on Tuesday after being hampered by the problem in the latter half of the 2020-21 season.
It was decided the damage was so severe that rest alone would not repair it.
And United hoped the England striker could have the operation immediately.
However, the surgeon is not available until the end of July.
It is anticipated Rashford will be out for 12 weeks.
It will be a blow to United boss Ole Gunnar Solskjaer’s plans for the start of the new campaign.
The news emerged on the day Rashford’s England team-mate Jadon Sancho had a medical.
Sancho’s £73m move to United from Borussia Dortmund edged closer.
Rashford had good 2020/2021 season
Rashford scored 11 goals in 37 Premier League appearances last season.
However, he did not make a significant impact for England at Euro 2020.
He made five appearances for his country in the tournament.
However, he was only on the pitch for a total of 84 minutes.
He then missed a penalty in the shootout as Italy beat Gareth Southgate’s side on penalties in the final.
Him together with Sancho and Bukayo Saka received racial abuse on social media after the game.
A mural of Rashford in Withington, Manchester, was also defaced.