Ulster lost out 26-24 in their Pro14 clash with Ospreys at a rain-swept Liberty Stadium in Swansea, despite staging a second-half comeback.
Ulster had fought their way back from 23-10 down early in the second half and had a chance to win at the death, but Bill Johnson’s 83rd minute drop-goal attempt was charged down by Aled Davies.
And in the end, Ospreys took only their second Pro14 victory of the season after two tries from hooker Scott Otten and one from Wales centre Owen Watkin, plus two penalties and two conversions from Luke Price.
Ulster also scored three tries, through Robert Baloucoune, Matt Faddes and Stuart McCloskey, while Billy Burns and Bill Johnson supplied nine points between them.
Going into the encounter, Ospreys had lost 15 out of 16 competitive games this season, including nine defeats in 10 Pro14 games.
However, they showed tenacity in difficult windy conditions to lead 18-10 at the interval and ultimately held off Ulster’s concerted comeback.