Ulster 27 Ospreys 26:Ulster opened their Magners League campaign by taking the scalp of champions Ospreys in a pulsating game at Ravenhill. The lead changed hands several times and the match was in the balance until the end, but first-half tries from Stephen Ferris and Darren Cave helped Ulster to victory, while Niall O'Connor kicked five penalties and a conversion for a 17-point haul.
Ospreys, who arrived in Belfast having had four league points deducted for failing to field a side in for a re-arranged date in last season's corresponding fixture, were missing a raft of frontline players but had Dan Biggar firing on all cylinders as the fly-half scored a try and kicked two conversions and four penalties - a 100% kicking haul - to contribute 21 points.
Richard Fussell crossed for the visitors' further touchdown, but the Ospreys had to make do with a losing bonus point.
Biggar drew first blood for Ospreys with an early penalty which was matched by O'Connor seven minutes later after the Ulster fly-half had been badly wide with a long-range drop goal attempt.
O'Connor was then wide with his second penalty attempt after 17 minutes but Ulster had the bit between their teeth and a great charge into the Ospreys' 22 by ex-Springbok and new signing Pedrie Wannenburg led to Ulster putting a penalty into the corner.
From the lineout Rory Best's throw missed Johann Muller but when Jerry Collins failed to gather the overthrow, Ferris scooped up the ball and ran over unopposed. O'Connor slotted the conversion and Ulster were 10-3 up.
They extended their lead to 10 points when O'Connor landed a long-range penalty after the restart, but then Ospreys began to claw their way back.
First Biggar slotted a penalty after Ulster strayed offside and then, even with Nikki Walker sent to the bin for taking out David McIlwhaine without the ball, Fussell was put away in the left corner after it was Ulster's turn to mess up a lineout.
Biggar's excellent conversion tied the scores, but Ulster crept ahead again after Cave shook off the attempted tackle of Marty Holah for an unconverted score.
Biggar then kicked his fourth shot at goal from four attempts after Bryan Young was penalised at a scrum to put Ulster 18-13 up at the break.
The home side stretched their lead just after the restart with an O'Connor penalty but then, again, Ulster errors allowed the Ospreys back into the game when a poor pass from O'Connor to McIlwhaine was hacked downfield before Biggar got to the ball first for a 42nd-minute try which he then converted to put Ospreys 23-21 ahead.
O'Connor was then wide with a long range penalty before he put Ulster one point ahead with his fifth success from eight attempts after 53 minutes.
But the lead did not last as Biggar kept his 100% kicking record intact with six from six attempts to put Ospreys into a 26-24 lead after Ulster infringed.
But Ulster were not finished and after the Ospreys strayed in front of a kick ahead, O'Connor stepped up to slot what proved to be the winning penalty.