These are your rugby headlines on Saturday, April 123.

Ospreys coach 'frustrated' as semi-final place goes begging

Ospreys head coach Toby Booth described their Challenge Cup quarter-final defeat to Gloucester 'really frustrating' after his side were not 'as good as we could have been'.

The Ospreys fell to a 23-13 defeat at Kingsholm on Friday night, with the Welsh side struggling to make much of an impression in the game as their set-piece struggled against the English outift.

Afterwards, Booth admitted that it was the fact that the Ospreys didn't give a decent account of themselves on the back of last week's first-ever European knockout win was tough to take.

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"Bitterly disappointed," he said afterwards. "Frustrated. Not just mine, but the team's (reflections).

"I don't want to be disrespectful as I thought Gloucester were very good and deserved to win. I'm just frustrated around some of the elements of our game which didn't stand up as we would have liked them to. That made for a frustrating evening.

"When you're in cup rugby, you need to make sure you control your controllables better and deal with pressure. I'm not going to sit here and say it's a great learning curve. It is a great learning curve but I don't want to focus on that because we were here, we had a chance to move forward and we've not taken that.

"So it's really frustrating. The plus side is we've gone one step further than last time in a knockout competition. When the dust settles, we'll probably reflect on progress. The overriding emotion is disappointment as I don't think we were as good as we could have been."

Gloucester boss praises centre after audition in front of Wales coach

Gloucester director of rugby George Skivington has praised Max Llewellyn for how he's settled into life at the Gallagher Premiership club.

Llewellyn, who made his Wales debut last year, played 47 minutes of the Cherry and Whites' Challenge Cup win over the Ospreys, carrying well at times before being replaced by British and Irish Lions centre Chris Harris.

Afterwards, Skivington played down any injury concerns as he sang the praises of Llewellyn.

"Thankfully I think he’s alright actually," he said. "I was going to use Chris at some point anyway and that just seemed like a trigger to do that.

"But he’s been brilliant. I think Max has really grown in stature. He’s literally put seven kilos on this year so he has really got bigger.

"But I think in terms of the bloke he is, he’s come out (here) and the boys love him. We’ve got a good few lads his age, they’ve got a nice group. I think he’s a star for the future.

"Still got bits and pieces to do but the try he scored last week off the back of the lineout was absolutely outstanding. I saw Alex King was here today and presumably that’s what he was here for.

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Welsh hooker signs for Pirates

Welsh hooker Iestyn Harris has signed for Cornish Pirates on a temporary basis.

The 25-year-old, who represented Wales at under-20 level, has joined the Championship outfit on loan.

He goes straight into the fray for the weekend, being names among the replacements for the Pirates' clash with Ampthill tomorrow.

"With the injuries that we have had from the last game it has been important that we bring someone in to fill that space and, thanks to the support of Exeter Chiefs, Iestyn is that man," joint head coach Alan Paver said.

"He has been earmarked as a talented player who has just come back from injury, so we are looking forward to seeing him down at the Mennaye and integrating him in accordingly."

New heat guidelines to be introduced

World Rugby have revealed they will look to introduce extended half-times and more frequent water breaks during games played in high temperatures and humidity.

The sport's governing body will publish new guidelines this summer on the matter.

World Rugby's chief medical officer Eanna Falvey says alterations could be made to start times of games in order to avoid peak temperatures of the day.

"We propose to build this into the new guidelines," Falvey told BBC Sport. "Measures would include longer breaks and intervals, but also delaying kick-off for a cooler time."

Other measures could include encouraging players to keep on damp shirts, rather than putting a fresh dry shirt on.

World Rugby will also recommend an acclimatisation period of two weeks when moving from region to region.

Legend signs one-year deal

Ireland captain Peter O'Mahony has put retirement rumours to bed by signing a one-year extension with Munster.

There had been speculation over the 34-year-old;s future, with the veteran confirming after the Six Nations that he would take some time out to consider what to do next.

He had stepped down as Munster skipper each this year but his decision to extend his playing days means he'll be around until the end of the 2024/25 season.

It also means he will be available for international selection ahead of Ireland's two-Test series against back-to-back world champions South Africa.