Leinster's Devin Toner has been ruled out of Leinster's Guinness PRO14 final against Glasgow at Celtic Park.
Toner suffered a knee injury in last Saturday's semi-final victory over Munster at the RDS.
The veteran lock's injury will be further assessed, but he is set to be missing for 4-6 weeks.
Josh van der Flier, who produced a man of the match display against Munster in his comeback from a groin injury, came through the game without any issues.
Leinster booked their place in the PRO14 final by defeating rivals Munster at the RDS Arena in Dublin.
Leo Cullen's men will now face Glasgow Warriors in the Scottish city, which takes place at Celtic Park in the east end of the city.
The Blues are aiming to win the competition for the second consecutive year, while Glasgow were last crowned champions in 2015.
"He is still going under some studies but he's definitely ruled out for this week," said assistant coach Felipe Contepomi today.
"We'd like to think it's not a long-term injury but we still don't have all the tests. He's going through MRIs and those things.
"I haven't spoken directly to Dev about his World Cup prospects but I'm telling you, we hope it's not a long-term injury so hopefully, he'll be fine for the World Cup.
"It's still three months to go for kick-off."
