Munster are likely to be without fly-half Ronan O'Gara for their Heineken Cup clash with Edinburgh at Thomond Park on Sunday due to a hamstring injury.
The Irish pivot departed the action against Racing and Munster have confirmed the news from the scan he underwent on Monday is "not so good".
It is now expected that Ian Keatley will step up into the fly-half position after wearing the number fifteen jersey against the Paris side last week.
Munster did receive encouraging news on the fitness of Paul O'Connell, who came through the clash unscathed following time out of the game.
Back-row Niall Ronan and lock forward Donnacha O'Callaghan will undergo fitness tests before the game as Munster look to kick-start their season.