Leaders Clermont stunned by Grenoble
Grenoble stunned Top 14 leaders Clermont 16-13 at the Stade Lesdiguières to move up to fourth in the French championship.
Clermont had led 10-9 at half-time but a brave rearguard action after the break saw Grenoble add another big name to their list of conquests this season.
Sylvain Begon's side have already beaten Toulon, Toulouse and champions Castres so far this campaign and this latest scalp extended their unbeaten home record while lifting them to within a point of third-placed Castres.
It was Grenoble's 11th win of the season and the victory boosted their hopes of reaching the play-offs, although they could be overtaken by both Toulon and Toulouse over the weekend.
Clermont too can be overhauled at the top of the table this weekend depending on how Stade Francais fare against Brive on Saturday.