Just a couple of weeks before the Pro14 season starts, Stade Francais have been forced to cancel a friendly with Toulon.
Leicester Tigers were unable to keep Telusa Veainu and he will continue his career at Stade Francais, along with Gerbrandt Grobler.
Ben Botica scored two second-half penalties to help Bordeaux Begles to a 26-24 victory in a tightly contested match against Castres.
Bordeaux Begles gave another demonstration of their Top 14 title credentials with a bonus-point win over Clermont Auvergne.
Top 14 front-runners Lyon won again, while La Rochelle's Arthur Retiere grabbed a hat-trick and Brive left it late.
Stade Francais came into the Clasico sitting bottom of the Top 14, yet they pulled off a thrilling win in Paris as Toulouse wilted.
There were wins for Lyon and Racing 92 in the Top 14 as Bordeaux-Begles were usurped at the summit.
Toulouse have hit form and made light work of Bayonne at home, while Brive defeated Stade Francais.
Wing Teddy Thomas put more pressure on Stade Francais coach Heyneke Meyer as Racing 92 came out on top in the Paris derby.
An early red card was decisive as Bordeaux-Begles suffered their second defeat of the Top 14 season.