Montpellier moved to the summit of the Top 14 standings on Saturday thanks to a bonus-point win over relegation-threatened Bayonne.
Oyonnax were the other big winners of the day as they secured a massive result in their bid to avoid relegation with a bonus point victory over Grenoble.
Elsewhere, Biarritz fought back to claim a draw at home to defending champions Catres while Bordeaux-BÃ¨gles thrashed Perpignan.
Earlier in the day, Racing moved into the play-off places thanks to victory in the Paris derby.
Brive 26-24 Clermont
Stade FranÃ§ais 22-32 Racing MÃ©tro
Biarritz 34-34 Castres
Bordeaux-BÃ¨gles 23-5 Perpignan
Montpellier 43-27 Bayonne
Oyonnax 40-13 Grenoble
Still to follow: Toulon v Toulouse
Biarritz Olympique 34-34 Castres Olympique
Parc des Sports d'Aguilera, Biarritz
There was a healthy dose of controversy in Biarritz after referee Salem Attalah told Castres there was time left on the clock only to blow his full-time whistle when they kicked for touch to set up an attacking line-out.
This after BO were awarded a late penalty try after a series of collapsed scrums.
Biarritz led 19-15 at the break as Rory Kockott had an off day with the boot, missing three first-half penalties.
Tries: Ngwenya, Couet-Lannes, Penalty try
Cons: Yachvili 2
Pens: Yachvili 5
Yellow cards: Peyrelongue
Tries: Gray, Grosso, Bornman
Cons: Kockott 2
Pens: Kockott 5
Yellow card: Lazar
Biarritz: 15 Paul Couet-Lannes, 14 Takudzwa Ngwenya, 13 Aled Brew, 12 Charles Gimenez, 11 Teddy Thomas, 10 Julien Peyrelongue, 9 Dimitri Yachvili, 8 Imanol Harinordoquy, 7 Raphael Lakafia, 6 Benoit Guyot, 5 Thibault Dubarry, 4 Erik Lund, 3 Francisco Gomez Kodela, 2 Arnaud Heguy, 1 Thomas Synaeghel.
Replacements: 16 Fabien Barcella, 17 Benedict Broster, 18 Eric dos Santos, 19 Joshua Furno, 20 Yann Lesgourgues, 21 Seremaia nakala Burotu, 22 Damien Traille, 23 Eugene Van staden.
Castres: 15 Brice Dulin, 14 Geoffrey Palis, 13 Remi Lamerat, 12 Daniel Kirkpatrick, 11 Remy Grosso, 10 Remi Tales, 9 Rory Kockott, 8 Antonie Claassen, 7 Ibrahim Diarra, 6 Jan Bornman, 5 Rodrigo Capo Ortega, 4 Richard Gray, 3 Anton Peikrishvili, 2 Brice Mach, 1 Saimone Taumoepeau.
Replacements: 16 Marc Antoine Rallier, 17 Mihaita Lazar, 18 Benjamin Desroche, 19 Piula Faasalele, 20 Cedric Garcia, 21 Paul Bonnefond, 22 Romain Teulet, 23 Michael Coetzee.
Referee: Salem Attalah
Union Bordeaux-BÃ¨gles 23-5 USA Perpignan
Stade Jacques Chaban-Delmas, Bordeaux
Bordeaux-BÃ¨gles provisionally climb above Stade FranÃ§ais and Toulouse into the play-off places!
UBB, who led 16-5 at the break, will regret missing out on a bonus point but Matuisela Talebula extended his lead at the top of the try scoring charts with his 13th of the season.
For Perpignan, relegation is now a very real threat as they gear up for a crucial clash with Oyonnax.
Tries: Le Bourhis, Talebula
Cons: Bernard 2
Pens: Bernard 3
Yellow card: Connor
Yellow card: Ion
Bordeaux-BÃ¨gles: 15 Darly Domvo, 14 Metuisela Talebula, 13 Felix le Bourhis, 12 Julien Rey, 11 Blair Connor, 10 Pierre Bernard, 9 Heini Adams, 8 Matthew Clarkin, 7 Hugh Chalmers, 6 Louis Madaule, 5 Alikisio Fakate, 4 Cameron Treloar, 3 Albert Toetu, 2 Wayne Avei, 1 Jefferson Poirot.
Replacements: 16 Clement Maynadier, 17 Jean-Batiste Poux, 18 Jandre Marais, 19 Matt Graham, 20 Emmanuel Saubusse, 21 Thibault Lacroix, 22 Nicolas Sanchez, 23 Silviu Florea.
Perpignan: 15 James Hook, 14 Joffrey Michel, 13 Lifeimi Mafi, 12 Sione Piukala, 11 Richard Haughton, 10 Tommaso Allan, 9 Dewaldt Duvenage, 8 Daniel Leo, 7 Bertrand Guiry, 6 Alasdair Strokosch, 5 Luke Charteris, 4 Sebastien Vahaamahina, 3 Giorge Jgenti, 2 Guilhem Guirado, 1 Sona Taumalolo,
Replacements: 16 Romain Terrain, 17 Sebastien Taofifenua, 18 Romain Taofifenua, 19 Justin Purll, 20 Nicolas Durand, 21 David Marty, 22 Tommaso Benvenuti, 23 Paulica Ion.
US Oyonnax 40-13 FC Grenoble
Stade Charles-Mathon, Oyonnax
Oyonnax are still alive! The smallest club in the Top 14 are now level with Bayonne on the edge of the relegation zone, but have a game in hand.
It was one-way traffic as the hosts, who led 23-6 at the interval, scored four unanswered tries before Grenoble claimed a consolation five-pointer in the last minute.
Tries: Penalty try, Soqeto, Diaby, Figuerola
Cons: Urdapilleta 4
Pens: Urdapilleta 4
Yellow cards: Jenneker, Urdapilleta, Tichit
Try: Penalty try
Pens: Hart 2
Yellow cards: Hunt, Hegarty, David
Oyonnax: 15 Regis Lespinas, 14 Silvere Tian, 13 Pierre Aguillon, 12 Roimata Pune, 11 Jonathan Bousquet, 10 Benjamin Urdapilleta, 9 Agustin Figuerola, 8 Chad Slade, 7 Valentin Ursache, 6 Viliami Maafu, 5 Damien Lagrange, 4 Nemia Soqeta, 3 Marc Clerc, 2 Jody Jenneker, 1 Lukas Rapant.
Replacements: 16 Salim Tebani, 17 Clement Baiocco, 18 Damian Browne, 19 Mahamadou Diaby, 20 Fabien Cibray, 21 Samuela Wara, 22 Guillaume Bousses, 23 Antoine Tichit.
Grenoble: 15 Romain David, 14 Fabien Gengenbacher, 13 Ratu Ratini, 12 Rida Jaouher, 11 Nigel Hunt, 10 Benjamin Thiery, 9 Jordan Michallet, 8 James Hart, 7 Fabien Alexandre, 6 Henry Vanderglas, 5 Jonathan Best, 5 Benjamin Hand, 4 Naude Beukes, 3 Dayna Edwards, 2 Anthony Hegarty, 1 Albertus Buckle.
Replacements: 16 Laurent Bouchet, 17 Andrew Farley, 18 Hendrik Roodt, 19 Olivier Chaplain, 20 Julien Caminati, 21 Mathieu Loree, 22 Kevin Goze.
Referee: SÃ©bastien Minery
Montpellier HÃ©rault Rugby 43-27 Aviron Bayonnais
Stade Yves Du Manoir, Montpellier
What a performance from Montpellier, who outscored their visitors six tries to three with Flying Fijian Timoci Nagusa bagging a hat-trick.
Bayonne held on for 35-off minutes until the pace of the Montpellier game yielded dividends.
Montpellier led 19-17 but a one-sided second half saw the hosts cruise home.
Tries: Nagusa 3, Tulou, Gorgodze, Penalty try
Cons: PÃ©lissiÃ© 5
Yellow card: Trinh-Duc
Tries: Rokocoko, Ugalde, Fa'Aoso