Jonny Wilkinson admitted Toulon had to dig deep to secure Heineken Cup glory after coming from behind to beat fellow French side Clermont-Auvergne 16-15 in the final.
An attritional first half ended with the scores tied at 3-3 before Clermont edged ahead to 15-6 after 50 minutes of the game at the Aviva Stadium in Dublin.
But a try from former London Irish full-back Delon Armitage which was converted by Wilkinson, who also slotted over three penalties, secured a narrow victory for Toulon.
Wilkinson, one of five English players in the Toulon side, finally added the European title to his World Cup and Six Nations winners' medals.
But he admitted there is still work to be done, with the domestic Top 14 crown still up for grabs.
"The difficult thing is that our season doesn't stop there," said Wilkinson.
"The guys worked so hard together against a great team. It takes everything you've got.
"We hung in there and got the rub of the green. The difference between winning and losing (is small)."
Wilkinson said the feeling was even better than winning the World Cup but admitted they had to battle hard to secure victory as Clermont threw everything at them in the closing stages.
"It is right up there," he said of the European triumph. "In fact, it goes beyond (winning the World Cup) because life is in the now, it is not in the past.
"The next thing you seach for, the next goal you set life just gets better and better if you are in a club as good as this.
"It has been hugely important (to win this). You ask yourselves the questions all the time whether you still merit being there, whether you still deserve to be in teams like this.
"Moments like this give you that opportunity to look at it and realise what an amazing opportunity we all have. This is my world now, this team, this game.
"Every time we put three points on them they put five on us. We had to put a stop to that. They attacked so well, with such threatening players. We did go back a few yards but kept in there.
"At 15-6, I was saying to the boys one try and we're back. We got the penalty and the breakaway try did it for us."
Clermont skipper Aurelien Rougerie admitted afterwards his team had simply been outplayed.
"We simply came up against a very good Toulon team," he said.
"We finish one point off a great feat. We must go away and work to come back next season."