Manchester United boss Erik ten Hag was unhappy with fans jeering Anthony Martial during yesterday's home defeat to Bournemouth.
Martial started the game ahead of Rasmus Hojlund before the pair were swapped over by Ten Hag on 56 minutes.
The decision was greeted by loud cheers by the home support.
After the 0-3 collapse, Ten Hag said: "Two weeks ago against Everton he played a very good game.
"So he has absolutely the competences and abilities to play, so I don't think it is fair, after a performance like this, to go to one player. We as a group failed all together."