Scotland forward Simon Taylor is set to miss the next six weeks after breaking his foot.
The number eight suffered the injury on club duty with Stade Francais and is expected to be sidelined until the end of September.
The news was confirmed this afternoon by Stade team manager Ewen McKenzie.
"He was about to kick the ball but kicked someone else with his foot," McKenzie said.
"It's a shame because he's been going well (in pre-season)."
Taylor had been expected to start for Stade against Toulon in their Top 14 curtain-raiser on Friday.