Thibaut Courtois accused Watford winger Gerard Deulofeu of diving to win a penalty as Chelsea were thrashed 4-1 at Vicarage Road in the Premier League.
Chelsea were already down to 10 men after Tiemoue Bakayoko was shown two yellow cards by referee Mike Dean in the space of five minutes.
Soon after, Deulofeu ran through on goal and tumbled over the onrushing Courtois, Dean pointed to the spot and Watford captain Troy Deeney smashed in the spot-kick to give his side the lead.
Eden Hazard levelled for Chelsea before late goals from Daryl Janmaat, Deulofeu and Roberto Peyreya wrapped up a memorable victory for the Hornets — Javi Gracia's first in charge of the club.