PSG player Angel Di Maria faced his old club for the first time since leaving in 2014 and put in a match-winning performance as PSG won United 2-0 despite being without Neymar and Cavani.
His performance was memorable for many reasons, as Manchester United's fans and players looked to get at Di Maria early on.
The Argentine, who used to play for the Red Devils, received some mild jeering from his former fans and decided to respond after Presnel Kimpembe opened the scoring.
Hundreds of fans took to social media to point out that they had seen the words coming from the mouth of the PSG man
He appeared to shout "f*** off" at the United fans moments after PSG took the lead at Old Tafford.
Moments later the game resumed but Di Maria had a battle in the direction of the home supporters thrown at him.
The Argentine reacted by picking the bottle up and putting it to his lips, pretending to drink the beer inside.
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.
PSG eventually celebrated a 2-0 win in the first leg to give them the advantage.