SCOTT Williams believes Wales' summer tour has shown that they have developed strength in depth as they hunt a clean sweep.

Warren Gatland names his team to take on Argentina at 1pm tomorrow after being given a selection headache for the clash in Santa Fe.

Wales started the tour by beating South Africa in Washington and backed that up by stunning the Pumas in San Juan with a superb display of clinical points scoring and determined defence.

Head coach Gatland took a risk of leaving the majority of his senior figures at home after their 2017 exertions with the Lions and has reaped the rewards.

Fringe players have put in performances to put pressure on established Test beasts while the likes of Dillon Lewis, Adam Beard and Dragons flanker Aaron Wainwright, who made his international bow last weekend, have put themselves in the mix in World Cup year.

"A lot of young players have come through and played more rugby now," said Ospreys' bound Williams, who has continued to partner Hadleigh Parkes in midfield while Jonathan Davies is on the comeback trail.

"James Davies got man of the match [against Argentina], Aaron Wainwright came on and I thought he did really well for his first cap with a couple of turnovers.

"It's exciting to see young boys like that come on, make an impact, and take their opportunity. I think that's a credit to the coaches for mixing it up a bit and giving some opportunities to put the jersey on to other people.

"We had quite a lot of young boys out there, but I thought we showed quite a bit of maturity. It's great to have competition for places, it keeps you on your toes, and it ups your game.

"The strength in depth we're creating is very exciting and if you think about everyone who has been left out of this tour and the amount of people back at home, it can only be a good thing."

Wales are now looking to make it a hat-trick of successes to secure a first series win in Argentina since 1999.

However, Williams knows that they need to maintain their high standards because the Pumas will be stung by criticism of their underwhelming first Test outing.

"We've gone quietly about our business on this tour and we've been quietly confident," said the 56-times capped centre, who has left the Scarlets for their west Wales rivals.

"But there is still another test to go and I'm sure Argentina will look back at this game and be very disappointed to lose at home and in front of their crowd.

"We're expecting them to come out hard. We've got one week of training left and we want to end this tour with three wins from three."

Gatland is likely to tinker with his XV despite the excellent display last week.

The head coach pledged before leaving Wales that he would give all of his tourists a chance and everyone has been given game time apart from Lee, who has struggled with a back problem.

Hooker Ryan Elias could be given a start after backing up Elliot Dee in both Tests, as could scrum-half Aled Davies after being Tomos Williams' deputy against South Africa and Gareth Davies' versus Argentina.

Seven players have started both Tests - Dragons full-back Hallam Amos, wing George North, Dee, Lewis, lock Cory Hill, blindside Seb Davies and number eight Ross Moriarty.