Shaun Edwards reckons the Probables versus Possibles clash will be an intense affair
Wales defence coach Shaun Edwards expects the Probables versus Possibles clash in Swansea to be a full-blooded encounter.
The first Wales senior trail in 14 years takes place on Friday, May 30 as Warren Gatland's troops get set for the summer tour of South Africa.
And given that the prospect of international recognition is combined with a chance to get one over on team-mates and rivals alike, Edwards believes a big battle lies in wait at the Liberty Stadium.
"You play your hardest rugby against your mates and people who you know," said Edwards. "That's my experience from playing rugby.
"When you are playing against people you know, you want to be at your best because you don't want your opposite number not respecting you. When you go to another club and play against people you know, you want them to respect you.
"You want to make sure you're at your absolute best. Next time you're at training when you're in the same team, he might not think so much of you if you haven't put it in in this game and showed your merits, both in your physicality and in your skill level.
"We are having this trial because we want people to be match fit and they need to be going hammer and tongs at each other. They're playing for places."
With the Ospreys just missing out on a play-off spot in the RaboDirect PRO12, all four regions have now finished their seasons a full month before Wales play the first Test against the Springboks in Durban on June 14.
Edwards admits that failing to fill that gap without any competitive rugby could leave the tourists undercooked, something he feels Wales have suffered from in the past and something they are determined not to experience again.
"It has been an issue for us before having that six-week break, particularly in 2012 when we went to Australia," added Edwards.
"In the first half (of the opening Test) in Brisbane we were miles off the pace. In the second half we were all over Australia.
"Being match fit is a vital component because when you are playing Test rugby because you are hanging on by your finger nails. You need to be battle hardened and fit as a fiddle because you are playing against the world's best players.
"We're going to South Africa and that's the toughest place to go to play rugby in the world - physically it is the hardest place to play rugby. New Zealand based players are incredibly skilful etc but, for pure physicality and aggression, we're going to the hardest place in the world to play and we need to be ready.
"They are having a warm-up game against a Rest of the World side so it shows how serious they are taking it."
Whenever Bedlinog tackle Penallta a massive fixure is guaranteed but this Sunday there will be even more emphasis placed on the two rivals when they contest the SSE Swalec Plate final at Principality Stadium.
Ahead of their SSE SWALEC Bowl Final clash with Taffs Well at Principality Stadium on Sunday, Burry Port share their #FABXV nomination with WRUTV in the search for Welsh rugby's greatest volunteers. Everyone can get involved by sending nominations via twitter to @WRU_Community using the hashtag #FABXV
Cardiff Blues prop Gethin Jenkins and Ospreys centre Ben John look ahead to the first game at Principality Stadium in Saturday's double header which is promising to be a special occasion for all Welsh fans.
Carmarthen Quins Director of Rugby Ian Jones and committee member Jeff Thomas along with Llandovery chairman Handel Davies look ahead to Sunday's SSE SWALEC Cup showdown where both teams are out to prove 'West is best'
SWALEC ambassador Shane WIlliams is looking forward to Sunday's Finals Day where the Cup, Bowl and Plate offers a great opportunity for players and teams to experience the magic of playing at Principality Stadium
Carmarthen Quins coach Richard Kelly believes it is an exciting time to be part of the Scarlets region as his side take on local rivals Llandovery in the SSE Swalec Cup final on Sunday, as WRU TV's Graeme Gillespie discovers
Scarlets long serving prop Phil John talks to WRU TV's Graeme Gillespie about Judgement Day IV and SSE Swalec Cup finals day. The last time Llandovery were in the cup final in 2007, the Drovers claimed the spoils with Phil playing a major role in the engine room.
Meet Aberdare coach Luke Thomas whose #FABXV nomination goes to super volunteer Daz with a whopping 10 things he does for the club each week, all except the ironing! You can also join in the search for Welsh rugby's greatest volunteers, by sending your nomination via twitter to @WRU_Community using the hashtag #FABXV
SSE Swalec Cup kings Pontypridd travelled to Swansea, fully expecting a return to their second home but Llandovery had other ideas as they also sought victory in the semi-final to earn the right to play the final at Principality Stadium