Sierra suffered a dislocated right shoulder and will undergo surgery in the coming days, with his recovery timeline being around three months, the club announced Tuesday.
Analysis:Sierra suffered the injury in Monday's draw against Levante and was visibly in tears when he departed the contest. This is the worst-case scenario for the winger, who had been playing at a high level in recent matches. With a three-month recovery time, Sierra should be back in the squad around mid-January in a best-case scenario.
