India opener Virender Sehwag could miss the Champions Trophy beginning September 24 as he would be out of action for 12-16 weeks following a surgery on his shoulder. Sehwag,who was ruled out of the Twenty20 World Cup without playing a single match,went under the knife on June 11 and will be under the observation of India team physio Nitin Patel during his stint at the National Cricket Academy in Bangalore. Sehwag's shoulder will be evaluated 10 weeks after the operation to check whether he can throw a ball,according to a report by a website. Sehwag sustained the injury during Delhi Daredevil's IPL semi-final against Deccan Chargers on May 21. Suspense over the Delhi batsman's injury during the T20 World Cup led to reports of a rift between him and captain Mahendra Singh Dhoni.