Watford winger Mauro Zarate has revealed he suffered an anterior cruciate ligament injury against West Ham on Saturday.
The Argentinian, a January signing from Fiorentina, twisted his knee awkwardly towards the end of the first half of the 1-1 draw against his former club.
Zarate required oxygen and nine minutes of treatment on the pitch before he was carried off on a stretcher and taken to hospital for scans.
And on Sunday the 29-year-old revealed the extent of the damage in an Instagram post.
He wrote: "With sadness I inform you that the results show the following: anterior cruciate ligament rupture plus an injury grade 1 of medial collateral ligament.