Allen among four changes for Wales
CARDIFF BLUES centre Cory Allen will make his Test debut when Wales tackle Argentina at the Millennium Stadium tomorrow.
At the other end of the scale, 20-year-old Allen's Blues colleague Gethin Jenkins will become the fourth player to win 100 Wales caps after Stephen Jones, Gareth Thomas and Martyn Williams.
Wales coach Warren Gatland has made four changes from the side beaten 24-15 by South Africa last weekend.
Allen replaces an injured Jonathan Davies alongside Scott Williams in midfield, while Ospreys fly-half Dan Biggar starts instead of Rhys Priestland.
In the pack, Scarlets front-row prospect Rhodri Jones takes over from Adam Jones, who has a calf muscle problem, and an ankle injury sidelines flanker Dan Lydiate, so Justin Tipuric wears the number seven shirt and skipper Sam Warburton moves to blindside.
Rhodri Jones, 21, first featured for Wales against the Barbarians last year, and he was also part of the 2013 summer tour to Japan.
Biggar, meanwhile, was the Wales number 10 throughout last season's title-winning RBS 6 Nations campaign, taking his opportunities well while Priestland was sidelined with an Achilles tendon injury.
The highly-rated Allen, who cut his representative teeth on the international sevens circuit with Wales, has a golden chance to impress Gatland building towards the autumn finale against Australia on November 30.
Liam Williams has been named on the left wing, with Leigh Halfpenny and George North retained at full-back and right wing respectively.
Argentina coach Daniel Hourcade has made four changes. Santiago Cordero, a 19-year-old wing, takes over from injured Juan Imhoff.
Elsewhere, full-back Joaquin Tuculet is preferred to Lucas Amorosino, scrum-half Martin Landajo ousts Tomas Cubelli and lock Manuel Carizza starts instead of Mariano Galarza.
Bakkies Botha will play his first test in two years when South Africa play Scotland at Murrayfield on Sunday, one of five changes to the Springbok side that defeated Wales 24-15 last weekend.