Frank Lampard again got the better of Jose Mourinho as Chelsea won 2-0 at Tottenham on Sunday but the victory was overshadowed by the alleged racist abuse of Blues defender Antonio Rudiger.
Rudiger appeared to suggest he had been the subject of monkey chants in the second half after his involvement in Son Heung-min's red card, prompting three stadium announcements saying that "racist behaviour among spectators is interfering with the game".
It left a cloud over a game which should have been about Lampard, who won five trophies as a Chelsea player under Mourinho, beating his former boss for the second time.
After the match, Rudiger took to social media to call for decisive action. He added: “When will this nonsense stop?"
Tottenham have vowed to take the "strongest possible action" if any fans are identified as having made racist gestures.
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