Fiji Airways Flying Fijians winger Josua Tuisova scored a try as Toulon thumped Grenoble 22-3.
Leone Nakarawa also scored a try for Racing 92 but they fell short 16-11 to La Rochelle.
In the other matches Montpellier beat Clermont 23-28 and Castres defeated Agen 13-16.
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