Referee Paul Tierney told Liverpool boss Jurgen Klopp to calm down during Sunday's defeat of Aston Villa.
Klopp has cut a slightly frustrated figure off the back of his team being thumped 4-0 by Manchester City at the Etihad on Thursday.
And he was left exasperated once again when a decision did not go his way at Anfield this weekend.
Tierney waved away appeals for a foul on substitute Georginio Wijnaldum, which led to protests from Klopp on the touchline.
Without supporters in attendance to see the title winners in action amid the coronavirus crisis, verbal exchanges can often be heard now.
And Tierney's response to Klopp's protestations was picked up as the 39-year-old put the Reds boss in his place.
The official turned to Klopp and explained: “I missed it Jurgen. I'm like players, I'm going to make mistakes. I missed it."
He also told Klopp to “get over it", and the Liverpool manager was not too happy with how the incident played out.