Chelsea have been fined £20,000 by the Football Association after players and coaches surrounded referee Lee Mason at half-time during last Wednesday's 1-1 Premier League draw with Huddersfield.
The FA announced on Wednesday that Chelsea had accepted a charge "for failing to ensure their players and/or officials conducted themselves in an orderly fashion".
The Blues were angered when Mason awarded the hosts a corner, but then blew for half-time before it was taken by Willian. The official had adjudged the required stoppage time had elapsed.
Captain Cesar Azpilicueta, midfielder Cesc Fabregas and defender Antonio Rudiger led the protests.