Former Swire Shipping Fijian Drua player Vinaya Habosi scored his first try for the season to help his Racing 92 side edge Castres 34-30 in the Top 14 competition this morning.
The Top 14 leaders ran in five tries.
Fellow Fijian winger Wame Naituvi, full-back Henry Arundell, and hooker Camille Chat scored a try each.
A penalty try was also awarded to Racing 92. Meanwhile, La Rochelle followed up their 29-8 win over defending Top 14 champions Toulouse last weekend with a 29-20 victory at Pau for the first away win of the season.
Toulouse was the biggest winner in the Top 14 this morning, pulling off a 45-0 against Lyon.
With seven tries, including the first of the season from Antoine Dupont and a double from Thomas Ramos, the reigning French champions put in an impressive performance ahead of their Champions Cup trip to Ulster.
Stay tuned for the latest news on our radio stations