Vunipola was booed by Leinster fans before, during and after Sarries dethroned the Irish province by coming from behind to win 20-10 at St James' Park on Saturday.
"It was pivotal in terms of the way it changed the momentum of the game", said Saracens centre Brad Barritt, who emerged with the man of the match prize after becoming only the second player to captain a team to three wins in Europe's premier club competition after Leinster coach Leo Cullen. We hadn't quite been ourselves. Owen, in particular, just said that at times we'd been a bit tentative.
"It was nearly like the Maro yellow card released us and allowed us to play our game".
"I can't speak highly enough of the leaders around me".
"A message is only as good as the guys who follow it and today they were phenomenal".
This is Saracens' third Champions Cup title victory in four seasons after previously emerging winners in the 2015/16 and 2016/17 seasons.
Vunipola went off shortly after scoring his try, with an ice pack applied to his shoulder, giving Saracens a scare two weeks before they step up their bid for a possible European and domestic double with a home Gallagher Premiership play-off.
You're 10-3 up in the Champions Cup final and the clock has just gone red signalling the end of the first half and you're in possession of the ball.
It was nearly a rhetorical question; Farrell, the unswerving, bloody-minded England fly-half whose battle with Ireland and Lions star Johnny Sexton was one of numerous fascinating match-ups, did not really give his team-mates any option at all.
"They won the big moments", said Sexton.
"They are actually really good at understanding what the situation is, and when you've got that clarity you are able to find solutions to anything". "They try and steamroller you".
"When a team is trying to chase the game against them it becomes very hard because they are so aggressive in the middle of the field and are very comfortable defending and putting the squeeze on teams".
"I thought they did that very well".
"I thought they did that really well and probably strangled us during the last 20 or 30 minutes".
"We're gutted but we don't want to blame anybody".
"It was nearly like the Maro yellow card released us and allowed us to play our game, and it's just pleasing when you can have a reaction", Saracens skipper Barritt said.