John Obi Mikel has undergone knee surgery, which has ruled him out of  Chelsea’s clash with Tottenham Hotspur in the League Cup final on Sunday  at Wembley Stadium.

Mikel was due to return to action this weekend, but he had to go under the  knife in a London hospital after feeling pain on the affected knee.

According to the defensive midfielder’s adviser,  the Nigeria  international will require at least four weeks to recover from the  ailment.