Dejan Kulusevski has undergone surgery on his right patella ahead of Tottenham Hotspur's Europa League final against Manchester United.
Spurs have not ruled him out for the rest of the season and say he "will commence his rehabilitation with our medical staff immediately".
Kulusevski suffered the injury during Spurs' 2-0 defeat at home to Crystal Palace in the Premier League last weekend.
The 25-year-old returned from a foot injury last month and featured in wins over Eintracht Frankfurt and Bodo/Glimt that sealed the club's spot in the Europa League final which takes place next Wednesday in Bilbao.