Tottenham Hotspur and the police have found no evidence of alleged racial abuse from supporters towards Chelsea's Antonio Ruediger during last month's Premier League match.
Ruediger was involved in an incident in which Tottenham's Son Heung-min was shown a red card and indicated shortly afterwards that he had been the victim of a monkey gesture from the home section of the crowd.
Play was stopped at the Tottenham Hotspur stadium and an announcement on the public address system informed the crowd: "Racist behaviour from spectators is interfering with the game."
Spurs responded swiftly, launching a full investigation alongside the police and vowing to issue lifetime bans to anyone found guilty, however, they have been unable to identify any perpetrators.
The police have now closed the case and no action will be taken.
A Spurs statement on Monday said the club have now "exhausted all avenues of investigation".
"The police have notified us today that, having reviewed and investigated, they have closed the crime report as they can find no evidence to support the allegation of racial abuse," Spurs said.
"We fully support Antonio Ruediger with the action that he took - however there is no evidence to corroborate or contradict the allegation and as such neither ourselves nor the police are in a position to take any further action.
"If any new information comes to light, this will be fully investigated."
Chelsea later reiterated their support for their German defender and stressed the importance of players not being afraid to report racism.
"We support Toni Ruediger totally and unequivocally on this matter, and as Tottenham's statement makes clear, a lack of evidence does not mean an incident did not take place," a Blues spokesman said.
"In responding to this incident, we must be very careful about the climate we create for players who experience and report racist behaviour.
"It is vitally important that we continue to encourage all players, whatever shirt they wear, to report racist abuse without fear of doubt or reprisal."
Australian Associated Press