Harry Maguire and Ole Gunnar Solskjaer both commended the 18-year-old out after his goal on 77 minutes cancelled out a Victor Lindelof own goal in the first half.
“Mason Greenwood is different class in and around the box,” Solskjaer told Sky Sports of the striker who has scored twice in his last four appearances.
“You’re not surprised when he scores goals. It’s fitting that it should be an academy player that scores in the 4000th match, and it makes me hard to leave him out.
“He knows where the goal is and just has the knack. I need to give him more game time.
“We have found just the right moment for him now, he is stepping up.
“We’ve always had the DNA, with added players from other top clubs, and that will always be the philosophy here.”