Ulster forwards coach Allen Clarke is still confident his side can make the PRO12 play-offs despite Saturday's loss to Munster in Limerick.
Despite being in the lead four times, Ulster ultimately managed to lose the match 20-22 as Rassie Erasmus's men continued their indomitable home form.
However, the Belfast-based side will be kicking themselves that they have not been able to capitalize on Ospreys' recent bad patch, which continued with a 35-17 defeat to Cardiff Blues.
But Clarke is eyeing the match with Ospreys as a crunch encounter, whom they are only one point behind outside fourth place.
"I think the fillip of all of it is that Ospreys were beaten by Cardiff so we're very much in the mix and probably before we came here we didn't expect that," Clarke told the Belfast Telegraph.
"We know that we can win these games. I have faith in the team, I have faith in the boys that we're going to be in the mix and we might be back here (Thomond Park in the semi-finals), who knows?
"We've got to go to the Ospreys now and win."