Bayonne continued their remarkable run in the Top 14 on Friday with a hard-fought 18-16 home win over defending champions Clermont.
Half-back duo Benjamin Boyet and CÃ©dric Garcia stared for the hosts as they kicked all of Bayonne's points, including a drop gaol each.
Clermont's Fijian try-machine Napolioni Nalaga was the only man to cross the whitewash - in the 52nd minute to give his side 167-12 lead - but the French champions were left to rue their numerous errors.
The crowd at Stade Jean-Dauger were treated to a grandstand finish as Garcia's 74th minute penalty bounced off the cross bar and over to hand the Basques a winning two point advantage.
Bayonne's win means they will finish the weekend at the summit of the Top 14 standings, unless Toulouse score a bonus point win in Biarritz on Saturday.
The home side's victory was based on their no-frills but highly effective gameplan and their kickers ability to capitalise on every opportunity.
It wasn't the prettiest of wins, as Bayonne were rather clumsy on attack, but they take the points as the continue their stunning revival.
Pens: Boyet 3, Garcia
Drops: Boyet, Garcia
Pens: Williams 3
Bayonne:15 Peptio Elhorga (c) 14 Jean-Baptiste Peyras, 13 Thibault Lacroix, 12 Lionel Mazars, 11 Sam Gerber, 10 Benjamin Boyet, 9 CÃ©dric Garcia, 8 Marc Baget, 7 RÃ©my Martin, 6 Bernad, 5 Troy Flavell, 4 Rob Linde, 3 Renaud Boyoud, 2 Arnaud HÃ©guy, 1 Pierre-Philippe Lafond.
Replacements: 16 FranÃ§ois Da Ros, 17 Aretz Iguiniz, 18 Abdellatif Boutaty, 19 Julien Puricelli, 20 Julien Audy, 21 Craig Gower, 22 Joe Pietersen, 23 Denis Avril.
Clermont 15 Anthony Floch, 14 Wesley Fofana, 13 Aurelien Rougerie (c), 12 Gavin Williams, 11 Napolioni Nalaga, 10 Tasesa Lavea, 9 Kevin Senio, 8 Julien Bardy, 7 Elvis Vermeulen, 6 Julien Bonnaire, 5 Thibault Privat, 4 Jamie Cudmore, 3 Martin Scelzo, 2 Ti'i Paulo, 1 Thomas Domingo.
Replacements: 16 Mario Ledesma, 17 Vincent Debaty, 18 Jason White, 19 Sione Lauaki, 20 Ludovic Radosavljevic, 21 Brock James, 22 Julien Malzieu, 23 Davit Zirakashvili