Chelsea manager Jose Mourinho was banished from the dugout and midfielder Nemanja Matic was sent off the pitch as the Premier League champions lost 2-1 at West Ham United who climbed to second in the table on Saturday.
Mauro Zarate put the Hammers ahead after 17 minutes before Matic was dismissed just before halftime for a second yellow card.
Referee Jon Moss ordered him to leave the touchline after Mourinho apparently asked to speak to the referee in his room following the 44th-minute dismissal of Chelsea's Nemanja Matic for two yellow cards.
Manchester City are top on 21 points, followed by West Ham on 20 and Arsenal, Manchester United and Leicester on 19.
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