On a day marked by upsets, Top 14 leaders Toulon were given a 41-0 thrashing by relegation threatened Bordeaux-BÃ¨gles while Toulouse lost in Agen.
The bottom four clubs were victorious this weekend while the leading trio all lost as Mont-de-Marsan claimed only their second win of the season over high-flying Grenoble.
Elsewhere, Castres bounced back from three consecutive losses with a bonus-point win over Stade FranÃ§ais while Bayonne continued their revival against Perpignan.
In the late game, Montpellier came from behind to beat Biarritz.
Racing MÃ©tro 12-6 Clermont - Report here
Agen 22-9 Toulouse
Bayonnais 13-10 Perpignan
Bordeaux-BÃ¨gles 41-0 Toulon
Castres 44-13 Stade FranÃ§ais
Mont-de-Marsan 32-14 Grenoble
Montpellier 33-10 Biarritz
SU Agen 22-9 Stade Toulousain
Stade Armandie, Agen
Toulouse coach Guy NovÃ¨s slammed his team for not turning up as they lost second place in the standings as a result of yet another disjointed performance.
"It was a non-match. Agen deserved to win," said NovÃ¨s of the defending champions' showing.
Despite the much-needed win, Agen, who led 11-6 at the break, do not move away from the relegation zone since the bottom four all won.
Tries: Bales, Muller
Pens: Barnard 3
Pens: Beauxis 3
Agen: 15 Ben Seymour, 14 Saimoni Vaka, 13 Miguel Avramovic, 12 Senio Junior Pelesasa, 11 Nafitalai Henry Tuitavake, 10 Conrad Barnard, 9 Alexi Bales, 8 Ueleni Fono, 7 Remi Vaquin, 6 Jean Monribot, 5 Ross Skeate, 4 Lisiate Faaoso, 3 Viliamu Afatia, 2 Jalil Narjissi, 1 Bernard N Nomo,
Replacements: 16 Semisi Telefoni, 17 John Schwalger, 18 Esteban Lozada, 19 Pierre Julien, 20 Mathieu Loree, 21 Ilaitia lekaiwala Tagotago, 22 Silvere Tian, 23 Gert Muller.
Toulouse: 15 Clement Poitrenaud, 14 Maxime Medard, 13 Yann David, 12 Yannick Jauzion, 11 Timoci Matanavou, 10 Lionel Beauxis, 9 Jean Marc Doussain, 8 Gregory Lamboley, 7 Yannick Nyanga, 6 Jean Bouilhou, 5 Patricio Albacete, 4 Romain Millo chlusky, 3 Yohan Montes, 2 Gary Botha, 1 Gurthro Steenkamp.
Replacements: 16 Jaba
Bregvadze, 17 Antoine Guillamon, 18 Karl Chateau, 19 Sylvain Nicolas, 20 Luke Burgess, 21 Luke Mcalister, 22 Yves Donguy, 23 Census Johnston.
Aviron Bayonnais 13-10 USA Perpignan
Stade Jean Dauger, Bayonne
In heavy rain, Bayonne continued their revival with their third consecutive win and the closest result of the day.
A losing bonus point for Perpignan means the Catalans are now eighth, three points short of the play-off zone.
Three yellow cards didn't help the visitors' cause as they played most of the second half a man down.
Bayonne led 13-10 at the break and the scorers were not troubled in the second half.
Tries: Penalty try
Pens: Potgeiter 2
Yellow cards: Haughton, Guirado, Mele
Bayonne: 15 Scott Spedding, 14 Sam Gerber, 13 Joe Rokocoko, 12 Gabiriele Lovobalavu, 11 Marvin O'Connor, 10 Jacques Louis Potgeiter, 9 Cedric Garcia, 8 Dwayne Haare, 7 Julien Puricelli, 6 Jean Joseph Marmouyet, 5 Mark Chisholm, 4 Dewald Senekal, 3 Nemiah Tialata, 2 David Roumieu, 1 Aretz Iguiniz,
Replacements: 16 Gregory Arganese, 17 Vitolio Manukula, 18 Abdellatif Boutaty, 19 Marc Baget, 20 Guillaume Rouet, 21 Benjamin Boyet, 22 Thibault Lacroix, 23 Renaud Boyoud.
Perpignan: 15 Joffrey Michel, 14 Richard Haughton, 13 Lifeimi Mafi, 12 Sione Piukala, 11 Adrien Plante, 10 Gavin Hume, 9 David Mele, 8 Henry Tuilagi, 7 Bertrand Guiry, 6 Daniel Leo, 5 Bobins Tchale Watchou, 4 Guillaume Vilaceca, 3 Kisi Pulu, 2 Guilhem Guirado, 1 Sona Taumalolo.
Replacements: 16 Romain Terrain, 17 Sebastien Taofifenua, 18 Romain Bezian, 19 Luke Narraway, 20 Florian Cazenave, 21 Farid Sid, 22 David Marty, 23 Jeremy Castex.
Castres Olympique 44-13 Stade FranÃ§ais Paris
Stade Pierre Antoine, Castres
After five consecutive losses in all competitions, Castres bounced back in the best possible way: with a bonus-point win to close the gap on the leading trio.
CO led 20-6 at the interval with three of their five tries coming after the break, including Romain Cabannes' second.
Stade FranÃ§ais's continued poor form on the road leaves them five points off the play-off places.
Tries: Cabannes 2, Andreu, Taumoepeau, Teulet, Martial
Cons: Kockott 5
Pens: Kockott 2
For Stade FranÃ§ais:
Pens: Dupuy 2
Yellow cards: Wright
Castres: 15 Romain Martial, 14 Marcel Garvey, 13 Romain Cabannes, 12 Seremaia Bai, 11 Marc Andreu, 10 Daniel Kirkpatrick, 9 Rory Kockott, 8 Antonie Claassen, 7 Yannick Caballero, 6 Jan de bruin Bornman, 5 Rodrigo Capo Ortega, 4 Christophe Samson, 3 Karena Wihongi, 2 Brice Mach, 1 Saimone Taumoepeau.
Replacements: 16 Marc Antoine Rallier, 17 Michael Coetzee, 18 Matthias Rolland, 19 Pedrie Wannenburg, 20 Romain Teulet, 21 Remi Lamerat, 22 Remi Tales, 23 Anton Peikrishvili.
Stade FranÃ§ais: 15 Hugo Bonneval, 14 Francis Fainifo, 13 Paul Williams, 12 Geoffrey Doumayrou, 11 Jeremy Sinzelle, 10 Paul Warwick, 9 Julien Dupuy, 8 David Lyons, 7 Antoine Burban, 6 Pierre Rabadan, 5 Gerhard Mostert, 4 Anton van Zyl, 3 David Attoub, 2 Laurent Sempere, 1 Aled de Malmanche.
Replacements: 16 Remi Bonfils, 17 Rabah Slimani, 18 Scott Lavalla, 19 Olivier Missoup, 20 Jerome Fillol, 21 Jules Plisson, 22 Jerome Porical, 23 Stanley Wright.
Union Bordeaux-BÃ¨gles 41-0 Rugby Club Toulonnais
Stade Jacques Chaban-Delmas, Bordeaux
Something stinks about this result, especially in the light of Toulon president Mourad Boudjellal's comments on Friday that his club should be reimbursed for the wages of their French internationals on duty in Paris.
Despite fielding a team packed with world-class players, Toulon were totally dominated and trailled 20-0 at half time.
UBB fly-half Camille Lopez was brilliant, orchestrating a great attacking display from the hosts.
RCT were never up for the fight but nevertheless retain the championship lead.
Tries: Avei, Clarkin, Madaule, Munro
Cons: Lopez 4
Pens: Lopez 2
Bordeaux-BÃ¨gles: 15 Bruce Reihana, 14 Metuisela Talebulamaijaina, 13 Julien Rey, 12 Felix Le Bourhis, 11 Rafael Carballo, 10 Camille Lopez, 9 Heini Adams, 8 Matthew Clarkin, 7