Barcelona have confirmed that Jonathan dos Santos underwent knee surgery on Tuesday and that the procedure has been deemed a success.
The midfielder damaged the anterior cruciate ligament in his right knee in training in mid-October and was confirmed as set for corrective surgery this week.
Barca report that doctors Joan Carles Monllau and Ricard Pruna carried out the procedure and that it was a success.
Dos Santos now faces up to six months on the sidelines.