Angel Di Maria appeared to shout “f*** off” at the Manchester United fans moments after Paris Saint-Germain took the lead at Old Trafford.
The Argentine, who used to play for the Red Devils, received some mild jeering from his former fans on the night and decided to respond after Presnel Kimpembe opened the scoring.
BT Sport cameras showed the PSG players gathered together celebrating the goal by the touchline as Di Maria stared in the direction of the home fans.
He could then be seen shouting at them, and appeared to say “f*** off” as well as “p***” – the Spanish word for “b****”.
Hundreds of fans took to social media to point out that they had seen the words coming from the mouth of the PSG man.
The game resumed but moments later Di Maria had a bottle – which came in the direction of the home supporters – thrown at him.
This wasn’t the only incident from the match the Argentine was involved in on Tuesday.
The 30-year-old forward was also thrown into the stand by Man United’s Ashley Young after a collision towards the end of the first half.
The pair were chasing a loose ball down the touchline when Young gave Di Maria a shoulder charge which sent him flying off the side of the pitch and into the metal barrier surrounding the pitch.
His team-mates leaped to his defence by confronting Young, whilst Di Maria was eventually able to return to the field after receiving treatment on his left arm, specifically around his elbow.
He had a hefty landing on the concrete perimeter to the Old Trafford pitch, but Young, already on a booking, was not punished further by the referee.