Ian Gough
Former Wales international on BBC Radio Wales

The Ospreys need that something special, these knockout games are settled by special moments.

Like Giles in the first half, Ospreys need to find that spark again.

Ospreys are trying to force things in attack. An attempted pass from Owen Williams comes off the shoulder of centre Keiran Williams.

Gloucester respond with a charging run from number eight Zach Mercer and Ospreys knock-on in their own 22.

More Ospreys indiscipline and Gloucester's full-back slots over his fourth penalty.

A four-point lead for the home side now. Ospreys have to improve their discipline.

Gloucester's Wales centre Max Llewellyn is replaced by British and Irish Lions Test player Chris Harris. Some depth.

Llewellyn looks like he was carrying a knock after having treatment. He will be hoping he has impressed the Wales selectors.

Ospreys flanker Harri Deaves was player-of-the-match against Sale last weekend and he has just gained another important turnover penalty. His timing was impeccable.

Gloucester scrum-half Stephen Varney falls over while trying to catch a Jack Walsh kick, but it proves a masterstroke as the chip goes dead and the home side have an attacking scrum.

Message from Ospreys coach Toby Booth at half-time to his side would have been to show more discipline. His team were not listening as they give away an early penalty.

Both sides are back out on the field and there is just one point in it. The lure of a European Challenge Cup semi-final awaits.

French referee Pierre Brousset restarts the match as Gloucester fly-half Adam Hastings kicks off.

Ian Gough
Former Wales international on BBC Radio Wales

There are things that Toby Booth will want to address at half-time, the line-out strategy didn't quite work and the discipline needs to improve.

These things however can improve, a solid half from the Ospreys.

Ian Gough
Former Wales international on BBC Radio Wales

Ospreys have looked dangerous on the counter attack, there is space for the Ospreys to attack.

Image source, Getty Images

Of course there are three other ties in the European Challenge Cup this weekend.

Tonight's winners progress to the semi-finals where they will face either Benetton or Connacht, who meet in Treviso on Sunday.

Gloucester are guaranteed a home tie if they win as they are ranked above either of those two teams.

Ospreys, if they win, would travel to Benetton or host Connacht.

The other semi-final is between the winners of tomorrow's quarter-finals in which Edinburgh travel to South Africa to take on top-seeds Sharks while Clermont-Auvergne welcome Ulster.

• Gloucester (2) v Ospreys (7)
• Benetton (3) v Connacht (11)
• Sharks (1) v Edinburgh (8)
• Clermont (4) v Ulster (12)

Semi-finals are played on the weekend of 3/4/5 May with the final at Tottenham Hotspur Stadium on Friday 24 May.

That was a topsy-turvy half which ebbed and flowed. One try each and hardly anything separates the sides.

One point in it and all to play for.

After Gloucester give away a penalty in their 22, Ospreys choose to go for goal with Williams successful.

And that's half-time. One point in it.

Image source, Huw Evans Picture Agency

Ospreys are looking to claim the lead just before half-time after Gloucester indiscipline. Owen Williams kicks to the corner.

Ian Gough
Former Wales international on BBC Radio Wales

Silly play from the Ospreys, they're not doing themselves any favours giving away these penalties.

They need to regain their composure and try to force Gloucester into making their own mistakes.

It has been a great few minutes for the hosts as they take advantage of Ospreys mistakes.

Ospreys not only concede a penalty but bring the kick into range with backchat to the referee as they are marched back 10 metres.

Santi Carreras slots it over.

Great maul defence from Ospreys thwarts that Gloucester attack. A trademark from Toby Booth's side as they defend on their own line and get the scrum.

But Gloucester get the scrum penalty. Another chance.

Silly penalty from Ospreys. Flanker Harri Deaves in front of the kicker. Gloucester have a chance to attack now.