Top 14 champions Stade Français were defeated in dramatic fashion while there were home wins for Castres in La Rochelle on Saturday.
Castres 34-19 Montpellier
Stade Pierre Antoine, Castres
Castres number eight Alex Tulou scored a hat-trick to help the 2013 Top 14 champions defeat Montpellier at home.
Tulou's scores came either side of a try from new signing Julien Caminati as the side secured a fifth win of the season.
Rory Kockott and Demetri Catrakalis exchanged penalties in the opening five minutes before Tulou set off on a 50-metre run to score his first try in the corner.
Catrakilis hit back with a second penalty but Kockott responded before the hosts were put down to 14 men.
A third and fourth penalty from Catrakilis put Jake White's side ahead for the first time at 12-11 before Montpellier lost Paul Willemse to the bin. Caminati finished off a backline move to make it 16-12 to Castres at the break.
Tulou doubled his tally after the break prior to a Kockott penalty making it 26-12, but Bismarck du Plessis with a try on debut brought Montpellier back within seven points.
However a Caminati penalty and then Tulou's hat-trick try secured a big win for Castres.
Tries: Tulou 3, Caminati
Pens: Kockott 3, Caminati
Yellow Card: Mach
Tries: B du Plessis
Pens: Catrakilis 4
Yellow Card: Willemse, Mackintosh
Castres: 15 Geoffrey Palis, 14 Julien Caminati, 13 Thomas Combezou, 12 Rémi Lamerat, 11 David Smith, 10 Christophe Dumora, 9 Rory Kockott, 8 Alex Tulou, 7 Alexandre Bias, 6 Piula Fa'asalele, 5 Richie Gray, 4 Rodrigo Capo Ortega, 3 Karena Wihongi, 2 Brice Mach, 1 Mihai Lazar.
Replacements: 16 Marc-Antoine Rallier, 17 Yohan Montès, 18 Christophe Samson, 19 Johnnie Beattie, 20 Antoine Dupont, 21 Romain Martial, 22 Florian Vialelle, 23 Saimone Taumoepeau
Montpellier: 15 Benjamin Fall, 14 Jesse Mogg, 13 Timoci Nagusa, 12 Julien Malzieu, 11 Marvin O'Connor, 10 Demetri Catrakilis, 9 Nic White, 8 Akapusi Qera, 7 Jacques du Plessis, 6 Antoine Battut, 5 Robins Tchale-Watchou, 4 Paul Willemse, 3 Nicolas Mas, 2 Charles Geli, 1 Mikheil Nariashvili.
Replacements: 16 Bismarck du Plessis, 17 Jamie Mackintosh, 18 Thibault Privat, 19 Kélian Galletier, 20 Benôit Paillaugue, 21 Ben Lucas, 22 Robert Ebersohn, 23 Pat Cilliers
Referee: Thomas Charabas
La Rochelle 33-16 Grenoble
Stade Marcel Deflandre, La Rochelle
La Rochelle secured a vital home win, comfortably dispatching Grenoble 33-16 to climb up the table.
Fiji international Levani Botia opened the scoring with a try in just the third minute, converted by Zach Holmes who added a penalty to give La Rochelle a 10-0 start.
Kevin Gourdon, the in-form number eight, continued his bright form with another converted try to give La Rochelle a huge lead after 15 minutes.
Grenoble responded with a Roussow de Klerk try, countered by another Holmes penalty, with efforts from the Australian and Jonathan Wisniewski making it 23-10 at half-time.
Wisniewski struck again from 40 metres after the interval before Holmes struck again as Grenoble went down to 14 men with a yellow card for Nigel Hunt.
Three more points from Wisniewski made it 26-16, Holmes adding his fourth three-pointer not long after, before Romana Graham saw yellow for a deliberate knock-on.
Kini Murimurivalu and Botia then combined to release Gabriel Lacroix for the clinching score, Jules LeBail converting to wrap up the win.
For La Rochelle:
Tries: Botia, Gourdon, Lacroix
Cons: Holmes 2, Lebail
Pens: Holmes 4
Yellow Card: Graham
Tries: De Klerk
Pens: Wisniewski 3
Yellow Card: Hunt
La Rochelle: 15 Kini Murimurivalu, 14 Gabriel Lacroix, 13 Charles Bouldoire, 12 Levani Botia, 11 Alex Northam, 10 Zach Holmes, 9 Ricky Januarie, 8 Kevin Gourdon, 7 Jone Qovu, 6 Afa Amosa, 5 Romana Graham, 4 Jason Eaton, 3 Uini Atonio, 2 Maxime Gau, 1 Vincent Pelo.
Replacements: 16 Benjamin Geledan, 17 Thomas Synaeghel, 18 Leandro Cedaro, 19 Romain Sazy, 20 Zeno Kieft, 21 Jules Lebail, 22 Eliot Roudil, 23 Gagi Bazadze
Grenoble: 15 Gio Aplon, 14 Lucas Dupont, 13 Chris Farrell, 12 Jackson Willison, 11 Xavier Mignot, 10 Jonathan Wisniewski, 9 Christophe Loustalot, 8 Rory Grice, 7 Mahamadou Diaby, 6 Peter Kimlin, 5 Hendrik Roodt, 4 Ben Hand, 3 Roussow De Klerk, 2 Antoine Hegarty, 1 Sona Taumalolo.
Replacements: 16 Arnaud Heguy, 17 Fabien Barcella, 18 Jonathan Best, 19 Stephen Setephano, 20 Lilian Saseras, 21 Fabrice Estebanez, 22 Nigel Hunt, 23 Dayna Edwards
Referee: Tual Trainini
Stade Français 21-24 Bordeaux-Bègles
Stade Jean Bouin, Paris
UBB defeated Top 14 champions Stade Français away from home, outscoring their hosts by three tries to two.
Jonathan Danty was shown an early yellow card for Stade but fly-half Jules Plisson missed two early penalty attempts to keep the score at 0-0.
The deadlock was finally broken on 23 minutes with a try from Djibril Camara in the corner.
Bordeaux-Bègles responded at the end of half, Julien Rey crashing over with Baptiste Serin's conversion giving the visitors the half-time lead at 5-7.
Sekope Kepu was introduced off the bench and UBB promptly scored through Loann Goujon, with Serin converting.
Stade scored a penalty try after constant pressure at the scrum, Plisson converting to close the gap to just two points. Serin somehow missed an effort in front of the posts but Plisson had no such issues putting Stade ahead for the first time at 15-14 with a penalty.
Former Blues fly-half Simon Hickey entered the fray off the bench to land a penalty for UBB to retake the lead – but Plisson's drop goal saw the scoreline switch again.
Scrum woes for UBB led to Kepu being yellow carded as Plisson made it 21-17 with another penalty shortly before full-time.
But it was won on an interception try by Heini Adams in dramatic fashion to leave Stade stunned.
For Stade Français:
Tries: Camara, Penalty Try
Pens: Plisson 2
Drop Goal: Plisson
Yellow Card: Danty
Tries: Rey, Goujon, Adams
Cons: Serin 2, Hickey
Yellow Card: Kepu
Stade Français: 15 Hugo Bonneval, 14 Jeremy Sinzelle, 13 Waisale Nayacalevu, 12 Jonathan Danty, 11 Djibril Camara, 10 Jules Plisson, 9 Will Genia, 8 Sergio Parisse, 7 Raphael Lakafia, 6 Jono Ross, 5 Pascal Papé, 4 Hugh Pyle, 3 Paul Alo-Emile, 2 Laurent Sempere, 1 Sakaria Taulafo.
Replacements: 16 Craig Burden, 17 Heinke van der Merle, 18 Paul Gabrillagues, 19 Willem Alberts, 20 Julien Tomas, 21 Morné Steyn, 22 Geoffrey Doumayrou, 23 Rabah Slimani
Bordeaux-Bègles: 15 Nans Ducuing, 14 Metuisela Talebula, 13 Sofiane Guitoune, 12 Julien Rey, 11 Blair Connor, 10 Baptiste Serin, 9 Yann Lesgourgues, 8 Marco Tauleigne, 7 Loann Goujon, 6 Louis Benoit Madaule, 5 Jandre Marais, 4 Julien Ledevedec, 3 Francisco Gomez Kodela, 2 Wayne Avei, 1 Steven Kitshoff.
Replacements: 16 Benat Auzqui, 17 Jefferson Poirot, 18 Berend Botha, 19 Hugh Chalmers, 20 Heini Adams, 21 Simon Hickey, 22 Felix Le Bourhis, 23 Sekope Kepu
Referee: Romain Poite