South Africa have released five players to their French clubs for Top 14 duty this weekend.
Wales flanker Dan Lydiate is targeting Heineken Cup glory with Racing Metro this season.
Racing Metro have denied reports they are set to make a bid for Wales and Lions star Leigh Halfpenny.
Cardiff Blues have finalised their squad with the signings of Wales duo Gethin Jenkins and Matthew Rees.
Exeter Chiefs will face the Heineken Cup champions for the second successive season after they were drawn with Toulon.
Ronan O'Gara has agreed to become assistant coach of Racing Metro after announcing his retirement from rugby.
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.
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