Referees' body PGMOL says it "strongly refutes" suggestions by Liverpool boss Jurgen Klopp that referee Paul Tierney's actions were "improper" during Sunday's 4-3 win over Tottenham.
The Football Association is also looking into Klopp's post-match comments after he said Tierney appears to have something "against" his team.
The German was shown a yellow card for celebrating Liverpool's 94th-minute winner in front of the fourth official and later claimed what Tierney said to him was "not OK".
The PGMOL (Professional Game Match Officials Limited), said Tierney "acted in a professional manner" throughout the game and when cautioning Klopp.
What happened?
Diogo Jota scored the winner for the Reds just 99 seconds after Richarlison made it 3-3 - with Liverpool having led 3-0 inside 15 minutes.
Klopp was furious with Spurs being awarded a free-kick which led to their equaliser and ran to scream at the fourth official after the winner, but hurt his leg in front of the Tottenham bench.
He was shown a yellow card by the referee after his celebration.
"We have our history with Tierney, I really don't know what he has against us," Klopp told Sky Sports. "He has said there [are] no problems but that cannot be true.
"How he looks at me, I don't understand it. In England nobody has to clarify these situations, it's really tricky and hard to understand.
"What he said to me when he gave me the yellow card is not OK."
PGMOL, the body responsible for Premier League referees, said: "PGMOL is aware of the comments made by Jurgen Klopp after his side's fixture with Tottenham Hotspur.
"Match officials in the Premier League are recorded in all games via a communications system.
"Having fully reviewed the audio of referee Paul Tierney from today's fixture, we can confirm he acted in a professional manner throughout including when issuing the caution to the Liverpool manager.
"So, therefore, we strongly refute any suggestion that Tierney's actions were improper."
Former England striker Alan Shearer told BBC Match of the Day: "Paul Tierney could have sent Diogo Jota off and he [Klopp] isn't too quick to mention that.
"Jurgen Klopp was lucky, when he went to the fourth official, just to get the yellow card and it's not the first time he has done it."
https://www.bbc.co.uk/sport/football/65443810