Ireland coach Joe Schmidt was pleased with the way his men fashioned their first ever win in Argentina but believes they will need to step up for the second and concluding test next weekend.
Schmidt's men were well worth their 29-17 win in Resistencia when tries from Chris Henry, Jonathan Sexton and Andrew Trimble saw them home.
Schmidt and his men will analyse the individual performances this week but he was pleased with the effort overall.
"It is very hard to say at first glance," Schmidt said.
"You are more team orientated in your analysis of a game during the match so to really get that individual flavour of delivery, we'll have to wait until we've had bit of a look at it.
"But there were some guys that did some very good things."
Ulster flanker Robbie Diack made his debut in the back row and the Connacht pair Kieran Marmion and Rodney Ah You made their international bows off the bench.
Schmidt is now turning his attention to the second test in Tucuman on Saturday evening when the Six Nations champions will bring the curtain down on their season.
"I think both teams have real room for improvement some of their young guys really impressed me," he said.
"There were a few of them who were very gutsy. I felt they made things very difficult for us.
"I think we can look forward to a pretty interesting battle at Tucuman in seven days.
"I thought they really got off the line well and put a lot of pressure on us when we had the ball, and they we found it pretty difficult to contain them when they carried it well.
"It was a Test match."