Dos Santos surgery successful Barcelona have confirmed midfielder Jonathan Dos Santos has undergone successful surgery on his right knee. The Mexico star sustained a serious cruciate knee ligament injury in training in October and, despite going under the knife, now faces six months out as he looks to return to full fitness by the end of the 2013/14 campaign. A statement on Barca’s website confirmed: "Jonathan dos Santos was successfully operated on this morning, following the injury to his right knee suffered in training last month. "Doctors Joan Carles Monllau and Ricard Pruna carried out the operation with the assistance of Egarsat. "Dos Santos was injured in training on October 23 and is expected to be out for about six months."