Manchester United came from behind to secure a surprise 2-1 win over Juventus away from home.
Cristiano Ronaldo had fired Juventus in front with his stunning second-half volley which left David de Gea with no chance.
However, Juan Mata equalised four minutes from time with a brilliant, curling free-kick.
Staggeringly, Alex Sandro netted an unfortunate own-goal to give United an unexpected victory over the Serie A side.
And, clearly delighted with his side’s victory, Mourinho couldn’t resist taunting the home crowd.
The Manchester United boss was filmed cupping his ear as he celebrated the win which infuriated the home side.
Juventus defender Leonardo Bonucci was fuming with Mourinho’s celebration and quickly ran towards the Old Trafford boss to challenge his behaviour.
Mourinho was quickly shepherded off the pitch before tensions could rise any further.
But Mourinho’s taunts didn’t sit well with former Red Devils ace Paul Scholes.
“This is everywhere he goes,” he said on BT Sport. “You need to win with a bit of class sometimes, shake the managers hand.
“I don’t think there’s any need for it but that’s the way he is.”
Meanwhile Owen Hargreaves took a differing view.
“No it’s not necessary but I think this game is a remarkable result really,” Hargreaves said.
“Nobody thought (it would happen). And obviously the derby on Sunday, it’s a big week for United and Mourinho.”
But BT presenter Gary Lineker agreed with Scholes, saying: “Sometimes it’s ‘all about me’.
“Of course he’s been under pressure, it’s totally understandable, you’ve won.
“But sometimes you think…”
Following the win, Jose Mourinho hailed his side for fighting back in Turin and explained his taunts.
“The game was a very good game. It was top,” he said.
“We performed at a high level. We had about five minutes after that goal to wake up again but the team was there until the last.
“On a beautiful Italian day, I made a little thing.
“I know millions are happy with the win. But I respect Juventus and the quality they have.
“I am really proud of my boys because they did everything.
“A couple of our boys said in the interview at home that they were a little bit [makes gesture]… We had to come and not feel inferior.
“We were in a situation where we thought we needed to go to the last second of the match. The boys started really well and things were under control.”