A five-week break has been implemented in the Premiership, with the Champions Cup and Challenge Cup quarter-finals pushed back.
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.
Racing 92 stretched their Top 14 winning run to five matches with a dramatic defeat of Toulouse.
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.
Bordeaux-Begles are back at the top of the Top 14 and increased their advantage over Toulon and Toulouse.
Handre Pollard missed some crucial kicks on his Montpellier debut while Top 14 leaders Lyon
Lyon's lead at the Top 14 summit was reduced to just one point as they were comprehensively beaten 33-8 by Montpellier on Saturday.
Toulouse's contrasting home and away form continued as they defeated visitors and 2018-19 Top 14 final opponents Clermont Auvergne.