AC Milan forward Mario Balotelli faces 10 days out with a shoulder injury suffered in the 1-0 defeat to Atletico Madrid on Wednesday night. Balotelli was taken off in the 78th minute of the last-16 Champions League first leg tie at the San Siro after a nasty fall. The 23-year-old's left the stadium in heavy strapping, and today's scans confirmed that, while he will miss the weekend's Serie A clash with Sampdoria, he will miss less than two weeks of action. A statement released on the club's official website read: "AC Milan wishes to communicate that in yesterday evening's match, Mario Balotelli suffered a shoulder injury.