In a statement, Barcelona said that Fati, who turned 18 this month, has torn his internal meniscus on the left knee in the match against Betis.
At the end of the first half in the game against Betis, he complained of knee pain, after which he remained in the dressing room at half time and was replaced by Lionel Messi. The Argentinian had started on the bench because he would be affected by the ankle.
The club will consider various treatments, it says, and depending on that, it will be unavailable for a certain period of time.
But it is already clear that Barcelona will not be able to rely on its goldcrest for a long time. Fati was in top form this season, scoring 5 goals in ten matches in the league and the Champions League.
Fati was also called up to the Spanish national team for the games with the Netherlands, Switzerland and Germany.
