Barcelona's record 105 million-euro ($125 million) signing Ousmane Dembele is set to be sidelined for up to four months as the club confirmed the extent of the hamstring injury he suffered at Getafe on Saturday.

"The tests performed on first team player Ousmane Dembele have determined he has ruptured the tendon of the hamstring in his left leg," Barcelona said in a statement on Sunday.

"The player will undergo surgical treatment by Dr. Sakari Orava this coming week in Finland. The expected time out will be between three-and-a-half and four months."

Dembele has made just three appearances for Barca since sealing his move from Borussia Dortmund last month for a fee that could rise to as much as 145 million euros based on performance-related bonuses.