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.
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