Tottenham Hotspur's Premier League match with Chelsea saw three separate announcements over the public address system amid claims of racist abuse from the stands.
Defender Antonio Rudiger made referee Anthony Taylor aware of monkey noises aimed in his direction from fans and the game was halted briefly while the match official went to the touchline to make both managers and his colleagues aware of the situation.
An announcement was made over the PA warning supporters that racist behaviour was "interfering with the game."
It is not the first time this season there have been incidences of racism in the Premier League and a new set of protocols have been released over what it is to be done during matches when there is abuse.
UEFA’s guidelines state that the first step is for the referee to request an announcement to be made in the stadium asking for the abuse to stop, warning that the match will be abandoned if it continues.
That is exactly what happened at Tottenham Hotspur Stadium.
However, a further two announcements were made during the match.
According to the UEFA protocols, the second step should see an announcement in the stadium with the match halted temporarily.
The third and final step, if racist abuse persists, is for the match to be abandoned.
Spurs released a comment on the Rudiger incident after their match with Chelsea had concluded.
"We are now conducting a thorough investigation which will include liaising with Chelsea and their players for their observations," read the statement from Tottenham.
"Any form of racism is completely unacceptable and will not be tolerated in our stadium.
"We take any such allegations extremely seriously and shall take the strongest possible action against any individual found to be behaving in such a way, including stadium bans."
