Clermont made it two bonus-point wins out of two in the Champions Cup as they beat Bordeaux-Bègles 49-33 at Stade Marcel Michelin.
UBB were the better team in the first half-hour and deservedly went 14-6 in front through Jean-Marcellin Buttin and Jayden Spence tries.
Three Morgan Parra penalties kept Clermont in contention before they increased the intensity. Noa Nakaitaci touched down to give them the lead before Alexandre Lapandry, Wesley Fofana and Sebastien Vahaamahina followed him.
Those 26 unanswered points took the game beyond the away side, but they battled until the end.
Buttin and David Strettle traded efforts before Sitaleki Timani and Metuisela Talebula followed suit, but it was Bordeaux who had the final word through Gauthier Doubrere.
Bordeaux ended Clermont's participation in the Champions Cup last season following a 37-28 victory at the Stade Marcel Michelin and they started this game with the intent to repeat that feat.
The visitors were excellent in the first few minutes and Buttin's try was the reward for their bright opening to the encounter.
However, ill-discipline kept Clermont in the match and Parra's first penalty reduced the arrears to four points.
The scrum-half was then on target at the end of the first quarter as the hosts continued to eat into that UBB's advantage, but the visitors hit back. Spence had been prominent throughout and his score, following excellent work by Marco Tauleigne, moved them 14-6 clear.
Despite that buffer, Bordeaux were still conceding needless penalties and Parra was more than willing to take the opportunities that came his way. A third effort off the tee got them to within seven before the home side crossed the whitewash for the first time as Strettle kicked ahead and Nakaitaci touched down.
Having gone into the break ahead, Clermont took that momentum into the second period and Lapandry extended their lead by barrelling over from close range.
Fofana then weaved his way across the line before Vahaamahina benefited from a dominant driving maul to make it 35-14.
That finished the match as a contest but Buttin scampered across the line out wide to give the visitors hope of a try bonus-point.
Although Strettle continued the scoring with another Clermont try, Talebula touched down for Bordeaux's fourth effort.
Timani took Clermont to within touching distance of the 50-point mark but they could not quite surpass it as UBB finished the stronger and went over through Doubrere.
Tries: Nakaitaci, Lapandry, Fofana, Vahaamahina, Strettle, Timani
Cons: Parra 4, Fernandez
Pens: Parra 3
Tries: Buttin (2), Spence, Talebula Doubrere
Cons: Madigan 2, Beauxis 2
Clermont: 15 Nick Abendanon, 14 David Strettle, 13 Remi Lamerat, 12 Wesley Fofana, 11 Noa Nakaitaci, 10 Camille Lopez, 9 Morgan Parra, 8 Camille Gerondeau, 7 Alexandre Lapandry, 6 Julien Bardy, 5 Sébastien Vahaamahina, 4 Paul Jedrasiak, 3 Davit Zirakashvili, 2 Benjamin Kayser, 1 Thomas Domingo
Replacements: 16 Nathan Charles, 17 Etienne Falgoux, 18 Clément Ric, 19 Sitaleki Timani, 20 Judicaël Cancoriet, 21 Ludovic Radosavljevic, 22 Pato Fernandez, 23 Aurélien Rougerie
Bordeaux-Bègles: 15 Jean-Marcellin Buttin, 14 Metuisela Talebulamaijaina, 13 Jayden Spence, 12 Joe Wakacegu, 11 Kobus Van Wyk, 10 Ian Madigan, 9 Yann Lesgourgues, 8 Marco Tauleigne, 7 Hugh Chalmers, 6 Luke Braid, 5 Cyril Cazeaux, 4 Tom Palmer, 3 Marc Clerc, 2 Clement Maynadier, 1 Sébastien Taofifenua
Replacements: 16 Benat Auzqui, 17 Steven Kitshoff, 18 Jean-Baptiste Poux, 19 Ole Avei, 20 Tristan Labouteley, 21 Gauthier Doubrere, 22 Lionel Beauxis, 23 Jean-Baptiste Dubié
Referee: Greg Garner (England)
Assistant Referees: Tim Wigglesworth (England), Paul Dix (England)
TMO: David Grashoff (England)