Chelsea's Salomon Kalou has been ruled out for "around two weeks", the Premier League leaders said on Thursday, after sustaining a thigh tear in Wednesday's League Cup loss to Blackburn Rovers.

Chelsea's statement said the Ivorian star had "sustained a minor tear to his upper left thigh" and that the injury would sideline him for "around two weeks".

The Blues, five points clear at the top of the table from champions Manchester United, are away to Manchester City in the league on Saturday.