Despite a 16-5 home victory over Stade Français in the 26th and final round of the Top 14, Biarritz could only finish ninth in their domestic championship, meaning the only Heineken Cup avenue left open to them is as Amlin Challenge Cup Champions, the same route taken by Harlequins a year ago.
"I want to be in the Heineken Cup because we have been playing in that competition for the last 12 years," said Blanco, France's flamboyant former full back who won 93 caps for his country.
"We want to be there because it is a tradition for Biarritz, because we enjoy that competition and because we must play the best teams and the best teams are in the Heineken Cup.
"I believe that having kept the club in the Top 14 plus a Heineken Cup ticket for next season we would have shown our supporters that this season was just a hiccup and the squad have reacted superbly.
"We are never happy just to be in a final because you still need to win it but it has been a relief to play this competition because we could play in the Heineken Cup next year by winning at the Stoop.
"We will go to London to win this final - we cannot do otherwise."
Blanco brought the curtain down on his illustrious career in the 1992 French Championship Final at Parc des Princes - against Toulon. That contest ended in a 19-14 defeat for Biarritz and Blanco is hoping history does not repeat itself in London.
"It's interesting," added Blanco, "but I like Toulon because I played some exceptionally physical matches against them.
"That was another type of rugby and another time, though. I do not have any sadness or regrets - times change and I hope this time the title will go to us.
"And there are no secrets to success - to beat this kind of team you must play an absolutely huge game.
"As it always is with Biarritz, we respect Toulon and we know that Friday will be a huge game, a big battle, and I hope that French rugby will show that it deserved four teams in the semi-finals of the Amlin Challenge Cup.
"I hope it will have a good impact on the Top14 and show the values and the toughness of our national championship.
"Our team is now better that it was two months ago. It's proof that, without the World Cup and then with a complete squad, the season would have been different. But it has given us the motivation to keep the club in the Top14 and get a Heineken Cup ticket for next season."