Toulon have opened their season with back-to-back defeats for the first time in a decade after losing 24-9 at Castres.
European Challenge Cup holders Gloucester will face local rivals Worcester Warriors in the 2015-16 competition.
Lionel Beauxis missed with the last kick of the game to cost Bordeaux-Begles a place in the Top 14 play-offs.
Dodgy refereeing, French figures and a sleeping giant's awakening feature in Rupert Cox's weekly blog.
Toulon returned to Top 14 duty with a comprehensive 37-21 demolition of struggling Castres.
Oyonnax stunned Clermont Auvergne at the Stade Marcel-Michelin and Toulon capitalised by winning away in Grenoble.
Rupert Cox shares his highlights from the week's rugby action in his round-up blog.
Toulon once again find themselves at the top of the French domestic league thanks to a five-try win over Brive.
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