Djibril Camara's last-gasp try gave Stade FranÃ§ais a shock win over last year's runners-up Castres to open the season.
Elsewhere Oyonnax came within minutes of a famous victory before eventually losing by a single point away at Toulouse.
And the two promoted sides La Rochelle and Lyon were given an idea of how far they still have to go, coming away with nothing from games at Brive and Bordeaux, with Brive going top thanks to a bonus-point success.
Earlier in the day Clermont were pushed all the way but held on to beat Grenoble on home soil.
Bayonne 15-29 Toulon
Clermont 30-26 Grenoble
Bordeaux-BÃ¨gles 18-9 Lyon
Brive 37-15 La Rochelle
Castres 22-25 Stade FranÃ§ais
Toulouse 20-19 Oyonnax
Montpellier 13-16 Racing-MÃ©tro
Union Bordeaux-BÃ¨gles v Lyon OU
Stade AndrÃ© Moga, BÃ¨gles
Top 14 newcomers Lyon gave a good account of themselves but eventually came away with nothing in a tryless encounter with Bordeaux.
Lyon had made the better start, taking an early 6-0 lead thanks to two penalties from new man Stephen Brett, who arrived from Bayonne over the off-season.
However Bordeaux got back level before half-time with two penalties of their own through Pierre Bernard.
There was more of the same early in the second half with two more penalties from Bernard to stretch the Bordeaux lead to six points.
New signing Lionel Beauxis took over the kicking duties from Bernard, and added another three points with ten minutes to go, extending the lead to nine.
And while Lachie Munro gave Lyon some hope with a penalty eight minutes from time, Beauxis' second penalty sealed the win.
Pens: Bernard 4, Beauxis 2
Pens: Brett 2, Munro 1
Bordeaux: 15 Darly Domvo, 14 Sofiane Guitoune, 13 Julien Rey, 12 Thibaut Lacroix, 11 Blair Connor, 10 Pierre Bernard, 9 Heini Adams, 8 Matthew Clarkin (c), 7 Hugh Chalmers, 6 Louis-Benoit Madaule, 5 Adam Jaulhac, 4 Julien Le Devedec, 3 Patrick Toetu, 2 Clement Maynadier, 1 Jefferson Poirot.
Replacements:16 Benat Auzqui, 17 Jean-Baptiste Poux, 18 Jandre Marais, 19 Taisina Tuifua, 20 Baptiste Serin, 21 Lionel Beauxis, 22 Romain Lonca, 23 Francisco Gomez Kodela.
Lyon: 15 Romain Loursac, 14 Toby Arnold, 13 Kendrick Lynn, 12 Fabrice Estebanez, 11 Mosese Ratuvou, 10 Stephen Brett, 9 Ricky Januarie, 8 George Smith, 7 Pierrick Gunther, 6 Julien Puricelli, 5 Lionel Nallet (c), 4 Bjorn Basson, 3 Anthony Roux, 2 Vincent Colliat, 1 Wian Du Preez.
Replacements:16 Deon Fourie, 17 Bogdan Balan, 18 Joseph Tuineau, 19 Frans Viljoen, 20 Waisele Sukanaveita, 21 Paul Bonnefond, 22 Lachie Munro, 23 Horatiu Pungea.
Referee: Pascal GauzÃ¨re
Brive v La Rochelle
Stade AmÃ©dÃ©e-Domenech, Brive-la-Gaillarde
Brive moved top of the table with a bonus-point success as they came to life in the second half of their clash with La Rochelle.
The promoted side had the better of the first half, and through the boot of Jean-Pascal Barraque and scrum-half Julien Audy they led 9-6 on the stroke of half-time.
However with the final move of the half, Brive finally broke the shackles, taking advantage of an interception to send Gaetan Germain over.
They had a two-man advantage at the time, with Peter Grant and Levani Botia both in the sin-bin.
The Germain try seemed to be the spark the home side needed, and they took control at the start of the second half with a second try from an up and under, Alfie Mafi on hand to touch down.
Grant returned to bring La Rochelle back to 14 men, but with a man advantage Brive scored their third try, Thomas Laranjeira this time the man to cross.
It was soon Brive's turn to be down a man, when skipper Arnaud Mela was given a ten-minute break, but the home side continued to dominate, adding another penalty through Germain.
La Rochelle began to fight back, with Audy and then Grant adding penalties to reduce the deficit to 15.
But another score from winger Sevanaia Galala ensured that Brive would pick a bonus-point victory.
Tries: Germain, Mafi, Laranjeira, Galalala
Cons: Germain 3
Pens: Germain 3
Yellow cards: Mela
For La Rochelle:
Pens: Barraque 2, Audy 2, Grant
Yellow cards: Grant, Botia
Brive: 15 Gaetan Germain, 14 Alfie Mafi, 13 Arnaud Mignardi, 12 Thomas Sanchou, 11 Elia Radikedike, 10 Thomas Laranjeira, 9 Jean-Baptiste Pejoine, 8 Petrus Hauman, 7 Dominiko Waqaniburotu, 6 Hugues Briatte, 5 Arnaud Mela (c), 4 Peet Marais, 3 Kevin Buys, 2 Guillaume Ribes, 1 Goderzi Shvelidze.
Replacements:16 Thomas Acquier, 17 Karlen Asieshvili, 18 Victor Lebas, 19 Said Hireche, 20 Benjamin Neveu, 21 Andrew Malilei, 22 Sevanaia Galala, 23 Damien Jourdain.
La Rochelle: 15 Peter Grant, 14 Sireli Bobo, 13 Jean-Pascal Barraque, 12 Levani Botia, 11 Damien Cler, 10 Hamish Gard, 9 Julien Audy, 8 Jone Qovu, 7 Kevin Gourdon, 6 Romain Sazy, 5 Leandro Cesaro, 4 Jason Eaton, 3 Uini Atonio (c), 2 Rassie Van Vuuren, 1 Vincent Pelo.
Replacements:16 Hika Forbes, 17 Jordan Seneca, 18 Jacobus Grobler, 19 Nicolas Djebaili, 20 Albert Vulivuli, 21 Julien Berger, 22 Charles Lagarde, 23 Lekso Kaulashvili.
Referee: Christophe Berdos