South Africa have released five players to their French clubs for Top 14 duty this weekend.
Former England winger Paul Sackey has signed for Harlequins on a three-year deal.
Worcester Warriors have confirmed the signing of French prop Jeremy Becasseau from Stade Francais.
Sale and Worcester have been drawn in the same pool for next season's Amlin Challenge Cup.
Leinster cruised to a 34-13 victory over Stade Francais in the Amlin Challenge Cup final.
Coach Joe Schmidt is determined to finish his Leinster career with a league and Amlin Challenge Cup double.
Sergio Parisse has urged Stade Francais to make history against Leinster in the Amlin Challenge Cup final in Dublin.
Leinster will be without the influential Brian O'Driscoll in Friday's Amlin Challenge Cup final against Stade Francais.
Stade Francais have confirmed the signing of South Africa fly-half Morne Steyn on a three-year contract.
Australia winger Digby Ioane has signed a two-year deal to play for Stade Francais from next season.
Perpignan will hope home advantage will count in their favour against Stade Francais in the Amlin Challenge Cup.
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Leinster prop Heinke van der Merwe has agreed to join Stade Francais on a two-year deal.
Second takes on third in the pick of the Top 14 fixtures with Clermont set to entertain Toulouse on Saturday.
Racing-Métro secured a crucial result in the race for the Top 14 play-offs with a bonus-point win over Mont-de-Marsan.
Jerome Fillol of Stade Francais has been given a 14-week benfor spitting at Bath's Peter Stringer at the weekend.
Stade Francais scrum-half Jerome Fillol has been cited for spitting at Peter Stringer.
Paul Sackey is set to return to England next season after confirming he will leave Stade Francais this summer.
Stade Francais beat Bath 36-20 to ensure there will be no English clubs in the Amlin Challenge Cup semi-finals.
Peter Stringer was furious after he was spat on during Bath's 36-20 defeat to Stade Francais.