Ulster assistant coach Neil Doak has confirmed that Jared Payne and Stuart Olding are still several weeks away from a return to action.
The pair will not be available for this Sunday's re-arranged European Champions Cup game against Oyonnax in France.
Olding has not played this season after suffering a cruciate ligament injury last March while Payne has been sidelined since fracturing his foot during Ireland's World Cup campaign.
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However, the province are set to be boosted by the return of fit-again Darren Cave and Craig Gilroy this weekend.