South Africa have released five players to their French clubs for Top 14 duty this weekend.
Exeter Chiefs will face the Heineken Cup champions for the second successive season after they were drawn with Toulon.
New Zealand winger Hosea Gear will leave the Highlanders at the end of the season to join Top 14 outfit Toulouse.
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.
Toulouse booked their place in the Top 14 semi-finals where they will face Toulon after defeating Racing-Metro 33-19.
Toulouse have made the Top 14 semi-finals every year since 1994 but will need to be at their best to beat Racing-Metro.
Toulouse have released former South Africa and Harlequins hooker Gary Botha.
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