Rhys Priestland knows more than most what to expect from his half-back partner Tavis Knoyle when Wales launch their autumn Test series against Argentina on Saturday.
While Knoyle might largely remain an unknown quantity outside Wales, the fact he has relegated Mike Phillips to bench duty this weekend should make people sit up and take notice. Knoyle, 22, who has seven caps so far impressed Wales' coaching staff their punishing training camp in Poland - which Phillips missed due to club commitments in France.
"I am chuffed for Tavis," said Priestland, who plays alongside Knoyle at the Scarlets. "He is such a well-liked character within the Wales squad and the Scarlets squad. He is a larger-than-life character and everyone feeds off his enthusiasm."
He added: "What's great about Tavis is that he always wants to learn and improve himself. He has been playing well for the Scarlets, and it is great for him to get a chance on Saturday."
Priestland has little doubt that Knoyle will be seen - and heard - in an opening autumn fixture that is followed by Millennium Stadium appointments with Samoa, New Zealand and Australia.
"Tavis shouts a lot on the pitch," Priestland added. "He has a high-pitched scream that he aims at the forwards!
"His understanding of the game is getting better all the time, and he shouts at the forwards, which is what you need from a number nine.
"He is one of the fittest players in the squad and he gets to breakdowns quickly. As a 10, all you can ask is that the nine gets the ball away, and he does that well.
"He is a big strong boy, and a lot of people have made comparisons between him and Mike. Hopefully, he will go well on Saturday.
"They are both physically-gifted players, although I don't think you can compare them. Mike has got a wealth of experience, and I am sure Tavis looks up to Mike."