Barcelona winger Ousmane Dembele will be sidelined for six months following surgery on a serious hamstring tear.The France international, 22, was on his way back to full fitness following another thigh injury when he pulled out of training last week.Dembele has suffered several injuries - in both legs - since joining the La Liga champions from Dortmund in 2017.He has played only three full games this season, missing 63 games in all competitions at Barca through injury.Dembele, a member of France's World Cup-winning squad, is expected to miss Euro 2020.