The La Liga giants confirmed on Monday that the French winger will miss between three and four more weeks of football after picking up an injury in Sunday’s 4-2 win over Real Sociedad.
The £96.8million summer signing from Dortmund was a second half substitute in the game at Anoeta and a club statement issued Monday said: ‘
At the end of the game he complained of discomfort in his leg. Tests have confirmed the player has a tear in the semitendinous muscle of his left thigh.’
The injury has not affected the surgery he had last year to correct a tendon problem that him out for three and a half months but it will mean he must spend a further month on the sidelines.
Barcelona will play Chelsea at Stamford Bridge in the Champions League on February 20.
If Dembele returns in four weeks he could start one league game – away to Eibar – before the trip to London.
The situation is far from ideal for coach Ernesto Valverde who also has concerns over Andres iniesta. The club captain has a calf strain and will return as soon as he responds to treatment.
Philippe Coutinho is Champions League cup-tied so Barça losing Dembele so close to their double-header with Chelsea is a major blow.