Beziers travel to Bath Rugby for the second leg of their quarter-final with a five-point advantage - but with coach Jean-Pierre Elissalde putting their opponents in the European "heavyweight" bracket.
"We are the underdogs on Saturday, no doubt about that," he said. "There will be a huge home crowd and Bath are having a good run at the moment.
"We will enjoy the challenge of playing at the Recreation Ground and hope that it will work out for us. If it doesn't, we will nonetheless have taken a great deal out of the experience.
"But Bath are in a category above us. It's like in boxing where you have the different weight categories and Bath are certainly heavyweights while we are a very young team.
"Bath are better organised than us and they play at a faster rhythm - but that is why these matches are so interesting. We are thrilled to be going to Bath. It is such a rugby stronghold and we hope we are singing on the way back."