Diack goes off to a rapturous applause in his final Ulster game.
Ospreys knock on in their own 22 from the kick off. Ulster with some great field position now.
Ospreys back in it now after the ball is spun out wide with a great skip pass from Hook to Dirksen, who shows great power to score in the corner.
20 minutes to go as Ospreys win the lineout inside the Ulster 22.
Penalty Ospreys, Treadwell slowing down possession. Biggar kicks to touch, finding it inside the Ulster 22.
Johnny McPhillips kicks into touch on the full. Ospreys line out on half way.
Gilroy makes tracks downfield after some loose ball.
Great pressure in defence from Cave as he puts a big hit on Hook.
Cooney clears and finds touch just inside his own half.
Play gets back underway with an Ulster line out.