Referee Mark Clattenburg will face no charges for alleged use of inappropriate language during a match after police dropped their investigation.
Scotland Yard said an investigation was launched into comments made during a match between Chelsea and Manchester United at Stamford Bridge on October 28, but that it could not continue as no victim had come forward.
"Inquiries were made and no victims have come forward," read a police statement.
"The matter will remain as a recorded incident.
"Without a victim and/or any evidence that any offence has been committed, the matter cannot currently be investigated.
"If the situation changes and a victim and/or evidence to support an allegation of a crime comes to police attention, then further inquiries will, if appropriate, be made."
The FA, meanwhile, have confirmed their own investigation into Clattenburg's alleged comments continues.
The 37-year-old referee returned to training in the top-flight Select Group of referees last weekend for the first time since the complaint was made.
He has always strongly denied Chelsea claims that he used a racist terms towards midfielder John Obi Mikel.