Some good pressure now from Ulster. After winning a scrum in midfield, Nathan Doak pokes through a clever grubber that is carried back over their own line by the Ospreys defence.

But hang on, the TMO is checking for an earlier cynical foul from Morgan Morris of the Ospreys in the build-up to that play. He slaps the ball out of the ruck and is given a yellow card. Ulster penalty five metres out from the ospreys line

Gareth Griffiths
BBC Sport Wales at Swansea.com Stadium

The official attendance that has been given here today is 5,093 which means the stadium is a quarter full.

Ospreys applying the pressure now. Jacob Stockdale fumbles the ball on his own 22 line, as if he is juggling a piping-hot piece of metal and he is hunted down!

Thankfully John Andrews is on hand to scoop up and eventually win his Ulster side a penalty.

A bit more of an open nature to the second half with both sides looking more adventurous already

Jake Flannery punts long into the Ospreys half to start this second half

Gareth Griffiths
BBC Sport Wales at Swansea.com Stadium

Not much between the two sides here in Swansea.

Before next Saturday's Six Nations trip to Dublin for Warren Gatland's side, Ospreys are looking to avoid becoming the third Welsh side to suffer a defeat against Irish opposition this weekend.

Scarlets lost to Munster on Friday evening and Connacht were successful against Cardiff on Saturday.

A rather unruly opening period, with plenty of errors from both sides.

Marcus Rea has the only try to show for the visitors, whilst Dan Edwards has kept the Ospreys in touch with two penalties.

Image source, BBC Sport

Not releasing in the tackle from the hosts and Ulster kick into the corner again, errors galore here. Can Ulster make this one count?

Almost immediately Ulster concede a penalty on the ground, 40 metres out and Dan Edwards steps up to drill this one between the posts.

Cormac Izuchukwu on for Iain Henderson, another big loss for the men in white.

However they have another lineout on the five-metre line after an infringement by the Ospreys on a previous lineout.

Finally we have a score! Just.

Dan Edwards gets the three points even if his kick clips off the inside of the post.

The answer is no...but Iain Henderson is pinged for a high tackle and this surely will be kickable.

Marty Moore has to leave the field and is replaced by Scott Wilson, unlucky for the veteran prop who has been plagued by injuries in recent years.

Now it's the hosts who have the lineout five metres from the Ulster line.

But they are driven back after multiple phases to the edge of the 22. Can they make a breakthrough?

Ulster maul from the lineout then win a penalty under the posts, but instead of the easy three Jake Flannery kicks wide left to Jacob Stockdale. But the big winger fumbles the ball before grounding. Innovative thinking from the visitors but still no points.

Now it's Ulster with their first foray into the Ospreys 22. Lineout coming up

Nick Timoney pinged for not releasing and Dan Edwards kicks into the 22.

But just as they threaten the Ulster line from the lineout, the ball is spilled and Iain Henderson grabs the loose ball. frustrating for the Ospreys.

Gareth Griffiths
BBC Sport Wales at Swansea.com Stadium

Ospreys have the upper hand in the scrum so far.

Having Wales loose-head prop Nicky Smith back from injury is a boost while Tom Botha, who has recently signed a new contract, is one of the best scrummaging tight-heads around.

Both sides look like they're playing with a bar of soap out there. Some torrential downpours in Swansea before kick-off may be to blame for the numerous handling errors we've seen.

Gareth Griffiths
BBC Sport Wales at Swansea.com Stadium

It is a slow start here in Swansea with both sides sizing each other up.

Cagey stuff so far.