"We are getting to a point in the season where the margin for error we have is pretty small," says Kayser, who finished last season as a French Championship winner with Stade Francais. "It's more or less like we have two quarter-finals in a row. These are big games with big pressure but we're very much looking forward to it.
"When you play for the first team, every time is incredible but these big games are the ones you really want to play and the ones where you really want to show what you are made of. I'm very much looking forward to it."
The 23-year-old France A international has impressed since joining Tigers in the summer and he hopes for both a strong personal and team performance in his 29th appearance in club colours.
"When you are part of a club, you want to be a part of the good times when you win things but you also want to do your best when you have to dig in and keep on going.
"I've got competition for my place week-in-week-out. Each week that I get told I'm going to start, I want to put in a good performance so that, next week, it's the same No2 that's playing. Adding the pressure just makes the game even better."