Chelsea assistant coach Gianfranco Zola implied the club will report Burnley to the Football Association (FA) after their coaching staff allegedly "offended" Maurizio Sarri in Monday's 2-2 draw.
An entertaining contest ended with fractious scenes, as a scuffle on the pitch saw several players get involved and it ended with a Mateo Kovacic booking.
Chelsea boss Sarri was subsequently given his marching orders after he had walked down the touchline, seemingly trying to talk to his players during the previous fracas.
Editors' Picks
The tension boiled over again at full-time as players and coaches headed towards the tunnel, with Antonio Rudiger – who did not play for Chelsea during the game – appearing to be particularly irritated by something.