Jonny Wilkinson kept Toulon top of the Top 14 table by booting all their points in a 24-19 win over Stade Francais in Paris.
The former England international was in metronomic kicking form, raining over eight penalties to edge Toulon, who have not won the domestic title since 1993, clear of their valiant hosts.
Stade full-back Hugo Bonneval ran the length of the pitch to give his team a 19-18 lead eight minutes from time, but ill-discipline at the breakdown cost them dearly.
Wilkinson kept his customary cool to knock over two late placed-kicks to ensure a hard-fought victory for Toulon on a busy Thursday night of action.
The current table-toppers now sit five points clear of Clermont, who stayed in touch with an 18-11 win at strugglers Agen.
Agen full-back Mathieu Lamoulie's late try earned his side a losing bonus point, though they still find themselves on the edge of the relegation zone.
They sit level with Bordeaux, who went down 22-11 to Bayonne. South African full-back Scott Spedding scored Bayonne's only try, while Wales scrum-half Mike Phillips came off the bench to help see his side over the line.
Castres came out on top in a high-scoring affair with Perpignan, edging out their opponents 38-36 thanks to a 79th-minute penalty from Rory Kockott, while Montpellier enjoyed a far more comfortable evening against Mont-de-Marsan, the winless visitors not being helped by having two players sent to the sin bin.
Yohann Artru crossed twice for Montpellier whilst they were two men to the good in the first half, plus Bustos Moyano kicked three conversions and two penalties.
Grenoble maintained their unbeaten home record and a place in the top six with another impressive display, beating Biarritz - who have now lost nine on the spin despite a late try from winger Takudzwa Ngwenya - 34-21.