Toulon have opened their season with back-to-back defeats for the first time in a decade after losing 24-9 at Castres.
David Strettle got his Top 14 chapter off to the perfect start with a try on debut as Clermont beat La Rochelle 44-6.
The best of Europe takes on the southern hemisphere champions as Toulon agree to face the Highlanders next year.
European champions Toulon have signed Australian pair Lachie Turner and Mitchell Inman as cover during the World Cup.
Veteran Fiji international wing Sireli Bobo has joined Top 14 club Toulon as cover during the World Cup.
Toulon have confirmed they are considering suing the ARU for "millions" over Quade Cooper's decision not to join the French giants.
Toulon president Mourad Boudjellal will seek "substantial compensation" from Quade Cooper if he does not honour his contract.
QRU withdraws its contract offer to Australia fly-half Quade Cooper to open the way for a move to Toulon.
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