Jonny Wilkinson's Toulon caught fire against Oyonnax as they racked up an astonishing 64-10 victory in their Top 14 clash.
Jonny Wilkinson booted Toulon to a 15-9 victory in a hard-fought Top 14 match away at Bayonne.
Round-up: Racing Metro were beaten 25-9 by Bordeaux-Begles at the Stade André Moga.
Montpellier capitalised on Clermont’s shock loss on Friday to move two points off top after defeating Perpignan 50-19.
Grenoble stunned Top 14 leaders Clermont 16-13 at the Stade Lesdiguières to move up to fourth in the French championship.
Wales assistant coach Shaun Edwards admits it is a case of "keeping our fingers crossed" that Jamie Roberts emerges unscathed from the weekend.
Toulon coach Bernard Laporte has been banned on matchdays for 13 weeks after an outburst against a match referee last month.
Jonny Wilkinson believes his unofficial coaching role at Toulon could help extend his career.
Australia international James O'Connor will join European champions Toulon next season.
Bath have confirmed that their England full-back Nick Abendanon will join French club Clermont Auvergne at the end of this season.
Balancing club and country commitments is the biggest potential banana skin of a move to France's Top 14.
Johnny Sexton admitted he has felt like quitting Racing Metro and returning to Ireland since his summer move from Leinster.
Clermont missed a chance to go top of the Top 14 as they fell to their sixth defeat of the season against Bayonne.
Wales star Leigh Halfpenny's move to reigning European champions Toulon is expected to be confirmed on Thursday.
France captain Thierry Dusautoir and winger Sofiane Guitoune have both been ruled out of the Six Nations.
New Zealand and Crusaders wing Zac Guilford will join Clermont Auvergne next season on a two-year contract.