the chelsea defender toni rudiger said he'd been subjected to monkey chants, prompting the referee to briefly stop play. as our sports correspondent andy swiss reports, it's the latest in a series of recent incidents affecting the english game. it was a day english football was once again overshadowed by racism. chelsea's antonio rudiger clearly showing he'd heard abuse from the crowd an hour into his team's game against tottenham. he informed his captain, who in turn told the referee, and after he spoke to both managers, for the first time in the premier league, a warning was made over the public address system, twice repeated. announcer: racist behaviour among spectators is interfering with the game. please remember that in football, there is no place for racism. at the end of the match the chelsea skipper explained what happened. toni came to me and he told me that he was listening in the crowd monkey noises, and obviously myjob as a captain is to go straight to the ref and to report it. now it's an investigation and we have to work all together towards eradication of the problem.