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.
Bordeaux came back from an 11-point deficit to defeat Toulon 28-23 in the Top 14 at the Stade Chaban Delmas.
Harlequins fought for a Champions Cup quarter-final place with a 47-19 win at Castres, but their efforts were in vein.
Conor O'Shea insists the agony of Harlequins' Champions Cup exit will spur them on for the rest of the season.
Leinster moved to the top of Pool Two of the European Rugby Champions Cup with a 50-8 victory over Castres.
We consider all the possible outcomes ahead of Round 5 of the European Champions Cup.
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