South Africa's two-time Rugby World Cup winning captain Siya Kolisi watched in the stands as his new club Racing 92 beat local rivals Stade Francais 13-9 on Saturday to move to the summit of the French Top 14.
Kolisi, 32, joined the side after lifting a second Webb Ellis trophy late last month but will make his debut for the Parisians next Sunday against La Rochelle.
Racing's victory in rainy conditions moves them above Stade Francais to top of the table based on their head-to-head record.
Kolisi's outfit led 10-6 at the break thanks to centre Henry Chavancy's try and four points from the boot of South African fly-half Tristan Tedder.
Stade Francais fly-half Joris Segonds made it a one-point game just after the interval with his third penalty of the match.
Racing, champions in 2016, held on for victory, an eighth straight at their rivals' Stade Jean-Bouin, as promising French scrum-half Nolann Le Garrec kicked a 54th-minute penalty.
Later, Test rugby's most capped player in former Wales and British and Irish Lions captain Alun Wyn Jones makes the final appearance of his career as Toulon head to Clermont.
Third-placed Pau, the surprise package this season, can leapfrog Stade Francais and Racing to top spot if they beat Bayonne.
France captain Antoine Dupont unusually starts at fly-half as Toulouse head to Castres, days after it was announced the playmaker would miss a big chunk of the 15-a-side season to prepare to play sevens at next summer's Paris Olympic Games.
On Sunday, Bordeaux-Begles travel to double Champions Cup winners La Rochelle, who have tasted victory just twice this campaign.
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