Just when Dafydd Jones might have imagined his Test career was about to take off, along came a new Wales coach who consigned him to the squad fringes.

But the Llanelli Scarlet with the tough-guy image is back in his favourite number six jersey and impatiently waiting for kick-off against Argentina in Buenos Aires tomorrow.

Wales coach Mike Ruddock has dressed up Jones' absence from the pre-tour 42-0 win over the Barbarians and 50-44 reverse by Argentina last weekend as an opportunity to bring 33-year-old Jason Forster (pictured right) up to speed at international level.

But Ruddock also let it slip that Jones had been "hurting" for his omissions since the coach succeeded Steve Hansen.

"Jason Forster is unlucky. The plan was always to bed him in at this level," said Ruddock.

"We did that by fielding him against the Barbarians and in the first Test of this tour last weekend - and he did very well. He had the highest tackle count with 17 and scored a try.

"We are not pointing the finger at Jason, but we wanted to look at a different combination and Dafydd Jones has done very well for Wales in the past and I need to see the back-row blend that involves Colin Charvis moving to openside.

"I see Dafydd as a blindside. He was hurting after not being involved in the last couple of games and I'm sure there is a big game in him on the back of that ."

Jones (pictured above) is determined to stake his claim to a long term role in the Wales back-row.

He said: "It's good to get my first chance under the new management so it's going to be a huge game for me."

And the 24-year-old has warned his team-mates that they can expect the second Test to be far tougher than the first.

He said: "After winning the first Test, the Pumas are really going to be well up for the return and it will be a big examination for us.

"Not being involved last weekend was really hard, but this is my big chance and it's up to me to make the most of it. There have been a few changes all round and it's simply a matter of us having to play better than last weekend.

"On a personal level it's nice to be back in the Wales number six jersey. It's my preferred position and where I have played almost all of my rugby. I can't really remember the last time I played at blindside for Wales."

Jones is now focused on Wales' revenge mission. He said: "It was a hard game up in Tucuman, but it's going to be even harder in the second Test. Argentina have also had a chance to take a look at us, but if we can eliminate our mistakes we should be in with a shout. We need to take the game to them - and if we do that, there is no reason why we can't do well."

A pubic bone injury rules out one of last week's try scorers, Martin Gaitan, with Grenoble's Jose Orengo taking over the number 13 jersey.

Nicolas Fernandez Miranda returns at scrum-half from club duties with Padua in Italy and takes over from Maties Albina.

Argentina: H Senillosa; J Piossek, J Orengo, M Contepomi, L Borges; F Contepomi, N Miranda; R Roncero, F Mendez, O Hasan, I Lobbe, P Albacete, M Durand, L Ostiglia, G Longo (capt). Replacements: M Ledesma, E Guinazu, P , M Shusterman, M Albina, J Miranda, F Aramburu.