Perpignan full-back/fly-half James Hook will not train this week after picking up a calf injury in his side's narrow Heineken Cup loss to Gloucester on Saturday.
Hook was the star of the show at Kingsholm, scoring all of his team's 22 points, only to see Jonny May's late try seal victory for Gloucester.
Hook has been joined on the sidelines by South African wing Wandilé Mjekevu, who has a thigh injury. Both will undergo fitness tests on Friday to ascertain their fitness ahead of Sunday's clash with Edinburgh at Stade Aimé Giral.
Good news for Perpignan however is that Tongan international prop Sona Taumalolo will be available.