Victory at the end of the suspense (22-23) for the Stade Français on the lawn of Perpignan.
The Brivists lost their invincibility at home, dominated by Stade Rochelais (6-8) which won its third success in seven matches.
Solid second behind Toulouse, UBB won on the lawn of the Section Paloise (33-37), during the 7th day, not without being scared.
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Calendar and results Top 14
Ranking Top 14
The Girondins thus led 27-9 before the break.
UBB remain undefeated this season.
Pau, already beaten last week by Toulouse, leaves with the defensive bonus.
In addition, Castres Olympique logically beat Biarritz 38-20.
The CO, who scored six tries during this meeting, takes the offensive bonus.
The BO loses its fourth game in a row and therefore remains the red lantern of the Top 14.