Wales coach Warren Gatland has targeted a clean sweep of victories on his side's summer tour after a hugely impressive 23-10 win over Argentina.
First-half tries from man of the match James Davies and George North laid the platform for Wales' success as fly-half Rhys Patchell kicked 10 points.
Against an experienced Argentina side - whose match day squad was entirely made up of players from Super Rugby outfit Jaguares - Wales' young pack stood up impressively.
"We've just spoken in the changing rooms about being two from two and wanting to make a clean sweep of it," said Gatland, whose team also downed South Africa 22-20 in Washington.
"It was a fantastic performance from the boys. We were under a bit of pressure in terms of territory and possession, but we knew how important our defensive display was going to be.
"The guys have trained well all week and they fronted up. That's what we asked of them and as a coaching team, you can't ask for any more than that. They put their bodies on the line.
"They gave it everything so it's a really pleasing performance for us."
Nicolas Sanchez's penalty gave Argentina an early lead, but from then on in Wales never really looked like going down to defeat as they countered their giant opposition.
"We feel like we're in a really good place at the moment and we're really looking forward to the next 12 to 14 months and on to Japan for the World Cup," Gatland said.
Wales will now face Argentina in Santa Fe in Saturday's second Test, looking to clinch their first series victory in Argentina since 1999.
Argentina head coach Daniel Hourcade admitted his team had been outclassed.
"Wales beat us in defence and they deserved to win," he said.
"They were very good and if we do not win the contact or are better at the breakdown, we will suffer again next Saturday."