And Wesley Fofana for one will have special memories of the 28-21 triumph over Joe Schmidt's Leinster in Round 4 as he crossed for the French club's only try.
Now it is the big one with Clermont bidding for a first Heineken Cup crown with an unprecedented ninth straight win of the campaign.
"We do not talk too much about it but it is true that these two wins against Leinster - and in particular the Dublin victory - were the real triggers of our European challenge this season," said Clermont's star centre.
"We gained enormous experience in that tie that has served us well since then but on Saturday we will simply be focusing on Toulon.
"And I am very eager to do battle against Toulon. This is a final and if we win that will be an exceptional achievement. Whatever happens, this will be one of the most important games of my career - these are rare moments and I want to make the most of the occasion.
"We are playing another French club but we are preparing for a European Cup final and we know more about Toulon than a foreign team because we've already played two games this season against the RCT. For me that is a positive.
"I think the score will be extremely tight, whenever we play Toulon the difference on the scoreboard is very little, and I'm sure there will be no difference of 30 points on Saturday night!
"The desire will be present on both sides - as you would expect is such a massive game - and we are well aware that Jonny Wilkinson will punish any of our mistakes."