The midfielder was introduced as a second-half substitute, before netting a 93rd-minute goal to claim all three points at Old Trafford.
It looked as if the Reds were going to have to settle for a point until Scott’s late strike, which keeps us three points behind Real Sociedad, with two games remaining.
“That’s massive for us,” McTominay told BT Sport. “That was the message before the game, strongly reiterated by the coaches – win the group.
“Everyone wants to win the group, it’s important for the games coming ahead so, as I say, for us, it’s massive.