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Barcelona announced that rising star Ansu Fati is likely to be sidelined for four to five months after undergoing surgery for a knee injury in Saturday's 5-2 thrashing of Real Betis in La Liga.

The 18-year-old managed to play the first half before making way for the legendary Lionel Messi at half-time and the Argentina international went on to score twice in the second 45.

Fati, Spain's youngest-ever goal scorer at senior level after his strike against Ukraine in UEFA's Nations League in September, has a torn meniscus in his left knee.

Fati has scored five goals from 10 appearances across all competitions so far this season with two assists.