Toulouse were left sweating over the fitness of fly-half Luke McAlister and centre Florian Fritz after both were injured in Saturday's Heineken Cup win over the Ospreys.
Former All Black McAlister was forced off in the 63rd minute of the 30-14 victory with what head coach Guy Novès described as a suspected 'muscle tear'.
France centre Fritz will undergo scans to learn how long he will be out of action after he sprained his right ankle. The 28-year-old was forced to go off shortly after he had scored the hosts' second try in the first-half.
Novès will hope he will not be deprived of the duo for long as he already has three backs out injured, with full-back Clement Poitrenaud and wingers Timoci Matanavou and Yves Donguy all sidelined.