Yorke believes Young can inspire the home side to a win.
He told talkSPORT: "I was interested to see how he would fit into the United set-up but he's gone in there and started on the front foot.
"When you do that and you play with fantastic players around you, you go from strength to strength.
"Ashley Young has become a key figure in that Man United team. He's become an essential player in the ranks and one that really needs to perform on the big stage, which I'm sure he will.
"He's better than I thought. I was a little bit sceptical to see how he was going to adjust, bute's gone in there and grasped the opportunity."