Milan's Zlatan Ibrahimovic was sent off for insulting referee Fabio Maresca during their 3-1 win over Parma on Saturday.
The veteran striker was sent off when he approached the official with the Rossoneri leading 2-0 after an hour.
It's unclear what Ibrahimovic said, but the referee issued a red card without first issuing a yellow.
It's not the first time referee Maresca has had a run-in with a high-profile figure. Inter manager Antonio Conte was given a two-match suspension in January after confronting him.
Ibrahimovic's fourth red card for Milan came after a nine-year absence from Italian football. It was also his first Serie A dismissal in 3353 days.
The 39-year-old's sending off, however, had no effect on the outcome, as Milan won 3-1.
While they face Cagliari on Sunday, Stefano Pioli's side has narrowed the gap to Inter to eight points.
Ibrahimovic, on the other hand, has received positive news, as his club has agreed to extend his deal until 2022.
“There are only small details missing and, therefore, we are very close to the renewal,” technical director Paolo Maldini told Sky Italia.
In October, Ibrahimovic will turn 40, and he is expected to earn about £114,000 a week.