Merson believes United boss Jose Mourinho will get things right against Tottenham.
He told Sky Sports: “Over the last three or four years, you see Manchester United turn it on in these type of games, when the pressure is on. They’ve done it to Chelsea, Arsenal, Liverpool, Tottenham, everyone.
“I don’t know how they do it. I’ve seen this so many times.
“Jose Mourinho will tell them to go out and prove they’re good enough to play for the biggest club in the world. Because that’s what they are, in my opinion.”
Merson’s prediction for the game on Monday:
Manchester United v Tottenham 2-1