Toulon will be without two World Cup winners in Bryan Habana and Juan Smith for Sunday's Champions Cup clash with Wasps.
The Springbok pair have both been out for extended periods but were expected to make their returns for the European quarter-final this weekend.
However they have been ruled out of that game, with Habana still suffering from a meniscus issue, and Smith has a knee problem.
Matt Giteau should be available however, although he may just feature on the bench in his first game back since January.
Delon Armitage and Leigh Halfpenny are both hoping to be fit for the clash, while Bakkies Botha is expected to return as well.
Toulon were beaten at home by Toulouse this weekend, but have never lost at home in Europe's top competition.