Neymar and Scott McTominay were forced to be separated as the pair headed for the Old Trafford tunnel after a feisty first half between Manchester United and Paris Saint-Germain.
Ole Gunnar Solskjaer's side entered the contest needing a point to advance to the knockout stages of the Champions League, while Thomas Tuchel's still have it all to do in Group H.
The sides ended the half unable to be separated thanks to strikes from the Brazilian and Marcus Rashford, but the contest saw its fair share of full-blooded challenges from the hosts, much to the Parisians' frustration.