Mark Hughes has accused Chelsea's top scorer Diego Costa of turning to 'the dark arts' during Stoke's 2-1 defeat to the league leaders.
Gary Cahill scored a late winner for Antonio Conte's side at the Bet365 to put his side thirteen points clear at the top of the table ahead of second-placed Tottenham.
The game was marred by foul play and though Stoke defender Phil Bardsley was sent off in added time, Costa walked a fine line throughout the contest.
The striker was booked in the first half and was fortunate to stay on the pitch after repeatedly clashing with Stoke defenders Bruno Martins Indi and Ryan Shawcross.