18 May, 15:44
It's down to the wire now for the five contenders who have been shortlisted for the ultimate individual accolade in northern hemisphere rugby, ERC European Player of the Year 2013.
Bonnaire and co go head-to-head with the reigning champions in Bordeaux next Sunday after a stunning success against English champions Saracens in the last eight.
Cotter has already made it clear that tonight's game not only offers a chance to move into outright first place in the Top 14 table but also gives his men the perfect opportunity to prepare for arguably their toughest test of the season.
The New Zealander believes Montpellier's attacking capabilities share similarities with those of Leinster and French flanker Bonnaire agrees.
"Tonight will be good preparation for the game in Bordeaux because Leinster and Montpellier are quite similar," said Bonnaire.
"They are very dynamic and have the ability to keep the ball alive after contact. François Trinh-Duc is able to break through a defence at any time and the fact that they have the best attack in the Top 14 is no fluke.
"But the pressure for the Heineken Cup semi-final can wait. Today we play Montpellier and the only goal is a victory. My team-mates and I never like to lose at home."
Cotter has made five changes for tonight's game from the team that saw off Sarries 22-3 a fortnight ago, with Bonnaire one of those rested with Leinster in mind.
Noa Nakaitaci and Regan King come in at wing and centre for Julien Malzieu and Aurelien Rougerie, Brock James starts at fly-half having replaced the injured David Skrela early on at Vicarage Road, Julien Pierre starts ahead of Jamie Cudmore in the second row and Bonnaire is replaced by Gerhard Vosloo on the flank.
ASM Clermont Auvergne (v Montpellier)
Byrne, Nakaitaci, King, Fofana, Sivivatu; James, Parra; Faure, Kayser, Zirakashvili, Pierre, Hines, Vosloo, Lapandry, Vermeulen
Replacements: Paulo, Debaty, Jacquet, Bardy, Radosavljevic, Malzieu, Russell, Kotze