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.
Harlequins have confirmed the signing of experienced second row Nick Kennedy.
Nick Kennedy is expected to join Harlequins after leaving European champions Toulon.
European champions Toulon have signed New Zealand lock Ali Williams on a one-year deal.
Toulon have confirmed the signing of Italy prop Martin Castrogiovanni from Leicester.
Exeter Chiefs will face the Heineken Cup champions for the second successive season after they were drawn with Toulon.
Jonny Wilkinson is prepared to discuss the possibility of joining up with the British & Irish Lions.
Castres claimed a shock 19-14 win over Toulon to win the Top 14 title and deny their opponents from doing the double.
Toulon stand on the verge of an historic Euro-French double as they face Castres in the Top 14 final on Saturday.
Toulon remain on course for a Heineken Cup and French league double after beating Toulouse 24-9 in the Top 14 semis.
Heineken Cup champions Toulon will look to close in on the double when they tackle Toulouse in the Top 14 semi-final.
Jonny Wilkinson has vowed to do everything he can to be ready to answer an injury SOS from the British and Irish Lions.
Delon Armitage admits he was "stupid" to mock Brock James as he scored a try in the Heineken Cup final.
Jonny Wilkinson has capped a triumphant Heineken Cup campaign with Toulon by being named European player of the year.
Toulon's Delon Armitage embroiled in row with past and present players after taunting an opponent.
Nick Kennedy describes winning Heineken Cup as pinnacle of his career and vindication of his decision to move to Toulon
Toulon staged a dramatic fightback to edge out French rivals Clermont Auvergne 16-15 in a thrilling Heineken Cup final.
Jonny Wilkinson admitted Toulon had to dig deep to secure Heineken Cup glory after defeating Clermont-Auvergne.
There will be new name engraved on the Heineken Cup trophy on Saturday when Toulon take on Clermont.