Gareth Baber has challenged Simon Humberstone to seize his opportunity at Cardiff Blues.
The 26-year-old Pontypridd fly-half made his regional debut against Worcester Warriors in the LV=Cup last weekend and is poised to have another chance against the Ospreys on Friday.
Rhys Patchell has been ruled out of the clash with a shoulder injury, while Gareth Davies is rated 50-50 after suffering a groin strain.
That leaves semi-professional Humberstone as the only fit fly-half candidate training with the Blues and Baber reckons the former UWIC star is playing for a full-time future.
"Rhys has a bit of a problem with his shoulder and Gareth picked up a slight strain last week," said Baber.
"Gareth is only a slight strain it's just a question of whether he will win the fitness race for this weekend. It's not as bad as first thought - there has been better news over the last few days.
"But we have Simon Humberstone who performed well and has impressed us enormously since he has come in - a lad who has being playing in Pontypridd but taken a step up here.
"He is quite capable of holding a position here and it's up to him. He's been given an opportunity and he needs to put in performances.
"When you're a young fella and are given an opportunity like this you have to get in and take it. This could be the opportunity he has been waiting for. He has an opportunity to get a contract."
And Baber expects a full-blooded Welsh derby at the Liberty Stadium, despite the lack of stars due to international duty.
"It's a local derby; it will be physical and are planning around how they play the game," said Baber.
"There will be energy, edge, two teams that know each other well and a lot of competition between the group. A lot of the boys would have played each other through the age-grades and they know each other well. We're hoping for a good crack at them on the weekend."
The Women's Rugby World Cup warm-up clash between Wales and USA proved bittersweet for centre Elen Evans. Despite being one of the star performers on the day on her 50th Test appearance, USA edged home 10-7 at Cross Keys.
Wales U20 head coach Byron Hayward and back row Will Boyde believe defence will be the key when they face Ireland tomorrow in the second pool game of the Junior World Championship being held in New Zealand.
Tension was palpable as players waited to hear the announcment of the Wales touring squad of South Africa. Matthew Morgan was one of four uncapped players named in the squad after impressing in the Wales Senior Trial.
Wales Trial, Principality Premiership Awards evening and Wales U20s in this week's Principality Welsh Rugby Union Podcast. We hear from Jamie Roberts and Matthew Rees about the Wales Trial, captain Dafydd Lockyer talks about Pontypridd dominating the Principality Premiership awards, while ahead of the start of the Junior World Championships we talk to Tom Williams, Steffan Hughes, Jack Dixon and Nicky Smith.
Coaches Rob Howley and Robin McBryde today confirmed their Probables and Possibles teams to take part in Friday's Wales Senior Trial at the Liberty Stadium and both are predicting some mouth-watering head-to-heads.
Possibles coach Robin McBryde has given his team a licence to thrill in Friday's Wales Senior Trial match. He tells WRU TV's Graeme Gillespie that his side will be determined to ruffle a few feathers against the favourites, the Probables.
We look at the squads for the Wales trial, European finals weekend and Wales U20 on this week's Principality Welsh Rugby Union Podcast. We hear from Warren Gatland and Rob Howley on the trial, full back Hallam Amos on his summer hopes, Wales legend Ieuan Evans welcomes European rugby finals weekend to Cardiff and Wales U20 hooker Ethan Lewis looks ahead to the Junior World Championships.
Wales Under 20 head coach Byron Hayward says last night's 31-19 win over Scotland was a crucial building block as the Junior World Cup rapidly approaches. WRU TV's Liz Jones gets his post match reaction.
It is the end of an era in Welsh rugby as Liza Burgess ends almost 30 years involved with Wales Women, on this week's Principality Welsh Rugby Union Podcast. We also hear what back Robyn Wilkins about what made her take up rugby. Gwyn Morris talks about getting the Principality Premiership referee of the year award, while we hear from director of rugby Mark Hammett at the Blues, Ospreys coach Steve Tandy and Dragons back Hallam Amos about the new season.