The Football Association is siding with referee Michael Oliver.
The FA rejected Chelsea's claim of wrongful dismissal in relation to Thibaut Courtois on Tuesday. That means the Belgian 'keeper's one-match suspension remains with immediate effect and he'll miss his side's trip to Manchester City on Sunday.
Courtois received a straight red card in the 52nd minute of Chelsea's 2-2 draw versus Swansea City on Saturday after he clipped Bafetimbi Gomis on the edge of his penalty box, denying the dreadlocked forward an obvious goal-scoring opportunity.
The sending-off completely altered the outcome of the fixture. Chelsea was leading at the time and Oscar, who'd opened the scoring earlier with a phenomenal free-kick, was forced to exit the pitch as Asmir Begovic replaced Courtois. Gomis then stepped up to the penalty spot and slotted his shot past the untested Begovic.
In order for a club's claim of wrongful dismissal to succeed, the club must prove to an Independent Regulatory Commission that the match referee made an obvious error.