Tottenham Hotspur and the Metropolitan Police have closed their investigation into alleged racist abuse aimed at Chelsea defender Antonio Rudiger.
Neither party has been able to find evidence to either "corroborate or contradict the allegation", made during Chelsea's 2-0 win over Spurs on December 22.
Spurs insist that they "fully support" the action taken by Germany international Rudiger during the fixture - reporting hearing monkey chants to Chelsea skipper Cesar Azpilicueta, who thus informed match official Anthony Taylor.
Spurs, responded swiftly, launching a full investigation alongside the police.
However, despite an "extensive" investigation, using CCTV and lip readers, the two parties have been unable to identify any perpetrators.
Now the north London club have confirmed that the crime report has been closed, but have once again declared their zero tolerance policy towards "any form of discrimination".
A statement from Spurs declared: "The Club and the Metropolitan Police have now exhausted all avenues of investigation following the reported incident at our home fixture against Chelsea on 22 December.
"We carried out extensive reviews of CCTV images and footage, working with professional lip readers. All materials and reports have now also been reviewed by the police who have carried out their own 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.
"We fully support Antonio Rudiger 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.
"We are fiercely proud of our anti-racism work and our zero tolerance of any form of discrimination. This is one reason why we have attributed so much time and resource to investigating this matter.
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"Had we identified anyone guilty of this we were intent on issuing them with a lifetime ban from our stadium as they would have no place among our proud, diverse fan base.
"If any new information comes to light, this will be fully investigated."
Chelsea have vowed to stand by the defender.
A club statement read: "We support Toni Rudiger 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.
"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."