Frédéric Michalak won't play again this season after fracturing his hand during Toulon's win over Castres this weekend.
The France fly-half was a second-half replacement in the 37-21 success but suffered the injury in the dying stages and now faces six weeks on the sidelines.
That rules him out of the remainder of the Top 14 campaign, and also makes it very unlikely that he will be included in France's 36-man squad for the World Cup, which will be named next week.
Var Matin report that he underwent an X-ray after the game which showed the fracture, the latest in an injury-disrupted season for Michalak, who only came back from a long-term shoulder problem at the end of March.
It's another blow for the player, but also for les Bleus, with Jules Plisson having already seen his season ended by a dislocated shoulder a fortnight ago.