Premier League champions Chelsea and West Bromwich Albion have both been charged by the English Football Association for failing to ensure their players conducted themselves in an orderly fashion during Wednesday's 2-2 draw at Stamford Bridge.
The charge relates to the 58th minute of the game, when Diego Costa tumbled in front of Claudio Yacob -- already booked -- as the Spain striker looked to join a counter-attack.
The Baggies midfielder avoided punishment, prompting Chelsea complaints led by captain John Terry. Yacob then departed two minutes later, substituted for Saido Berahino.
Both Chelsea and West Bromwich Albion have been charged following incident in Wednesday's game at Stamford Bridge: https://t.co/JUphmNL0hL
- The FA (@FA) January 15, 2016
An official statement on the FA's official website read: "Chelsea and West Bromwich Albion have both been charged for failing to ensure their players conducted themselves in an orderly fashion.
"The charge relates to an incident which occurred in or around the 58th minute of their fixture on Wednesday 13 January 2016. Both clubs have until 6pm on 20 January 2016 to respond to the charge."
Costa squared up to Baggies keeper Boaz Myhill at full-time, having earlier been involved in an angry exchange of words with defender Jonas Olsson.
The striker then punched the tunnel wall as he stormed off the pitch, with Chelsea boss Guus Hiddink saying: "A hole in the tunnel wall? We can repair that easily, it's not a problem.
"He's an emotional guy and I like that very much. If you have to push players it's difficult to survive in the Premier League, but if you have to control them it's much better."
Defending champions Chelsea sit 14th in the table with 24 points from 21 games, and host Everton on Saturday.
Tony Pulis' Baggies, who sit three points ahead of Chelsea in 13th, travel to Southampton the same day.