Chelsea striker Diego Costa facing four-game ban?

Chelsea striker Diego Costa could be handed a four-game ban by the Football Association for an alleged kick on Liverpool's Martin Skrtel.

The incident, which saw the Spaniard seemingly dig his boot into Skrtel's chest, took place during the Blues' 3-1 loss at Stamford Bridge on Saturday afternoon.

No action was taken by referee Mark Clattenburg at the time, but retrospective action could now be taken should it be deemed worthy of a red card.

Costa has already faced trial by television once this season when receiving a three-game ban for clashing with Arsenal defender Laurent Koscielny, meaning that he will automatically be handed a one-match suspension on top if found guilty for a second time.

Defeat for Chelsea leaves them down in 15th place, with the pressure continuing to build on manager Jose Mourinho.