Ousmane Dembele, 20, tore part of a tendon in his left thigh during the 2-1 LaLiga victory at Getafe on Saturday.
Barca announced the following day that the France international would require an operation and will be out of action for up to four months.
“Ousmane Dembele traveled on Monday morning to Helsinki, Finland, where he will undergo surgery to repair a rupture of the biceps femoris tendon in his left thigh,” the club said in a statement.
“Dembele was accompanied by team physician, Dr. Ricard Pruna.
“Dembele will be operated on Tuesday by Dr. Sakari Orava. Following the surgery, the club will provide a medical statement.”