Robbie Diack and Darren Cave, who both played the full 80 minutes of Ireland's first Test against Argentina, are hoping to use the summer tour as a springboard for further caps.
Robbie Diack, who qualifies for Ireland through residency, made his Test debut in the 29-17 victory over the Pumas and the experience has the South African-born back rower hungry for more.
Thrilled to win his first international cap, he said: "It's been a moment I've been looking forward to for my whole rugby career, I've always wanted to play professional rugby and to get there and get a cap under the belt is special for me, especially because it is with such a special team.
"Standing and singing the anthem was a moment I'll never forget. It's been a long week, I'm now glad it's over and that we got the win."
Diack lined out at blindside flanker and seemed to revel in the physical nature of the clash at Estadio Centenario, tackling and carrying strongly and also featuring prominently as a lineout jumper.
"I was happy with aspects of my game, but there are definitely things I'll have to work on. I thought in defence I could have worked harder at times," he admitted.
"I'm still very happy. To get my first cap, to get 80 minutes and the win it's a day I will never forget and I just want to cherish it."
When giving his reaction afterwards, Joe Schmidt singled out Diack for his 'hard work in the first half' and the 28-year-old, who has played for Emerging Ireland and the Wolfhounds in the last 12 months, will hope for more game-time in next weekend's second Test.
Schmidt was also pleased with the contribution of industrious centre Darren Cave as the post-Brian O'Driscoll era began with the Ulsterman in the number 13 jersey.
Cave made a terrific midfield break early on and was inches away from scoring a try in the final quarter, just putting a foot in touch under pressure from Tomas Cubelli as he touched down in the left corner.
It was a sixth Ireland cap and fifth start for the Holywood native, but those appearances have been spread out over five years - he made his debut on the 2009 summer tour - and his determination to nail down a regular starting spot is obvious.
In assessing his efforts as part of an all-Ulster centre partnership with Luke Marshall, Cave said: "I'm pretty chuffed with how it went. I got my hands on the ball early, which was good. To be honest it's left me wanting more. I made a couple of small mistakes, as did everyone, and it just leaves me wanting to play next week."
With the Pumas fielding a largely domestic-based team, there was a degree of unfamiliarity that Cave and company had to cope with as they prepared for the tour opener.
"When I first saw the list of Argentinian players on the plane I didn't know a lot of them. Joe has hammered us with the individual player profiles all week and I've been very impressed, particularly with club rugby in Argentina, which I would have known absolutely nothing about. I've been very impressed with the standard."
Having played his first international since last year's North American tour, the 27-year-old wants to retain his starting jersey and help Ireland see out a 2-0 series win.
"I was sucking diesel a wee bit if I'm honest, having not played in a couple of weeks and it being a bit humid and a bit warm. But, as I said, it's just left me wanting more."
The Irish touring party have flown back to Buenos Aires ahead of the second Test in Tucumán, for which some personnel changes are anticipated.
Head coach Schmidt said: "We'd expect that there will be changes. We'll have a look at who came through today over the next 48 hours.
"We won't do a lot tomorrow (Sunday), a little recovery and back to Buenos Aires. We'll try and make some decisions on Wednesday."
Half-backs Conor Murray (dead leg) and Jonathan Sexton (tight quad muscle) picked up injuries during the three-try victory in Resistencia. The strapping applied to Murray's left leg was precautionary.
A look back on a great weekend of Sevens rugby at UCD where fans from around the world came together to support their teams. Spain claimed the final place at Rio 2016 and Ireland retained their place on the HSBC World Rugby Women's Sevens Series.
The Ireland Women finished third in the World Rugby Women's Sevens Olympic Repechage tournament at UCD last weekend, retaining their place as a World Series core team in the process. Check out our bumper photo gallery from both days.
Tournament Director Garrett Tubridy sets the scene for an exciting weekend of rugby at UCD where 16 Women's Sevens teams will battle it out at for one qualifying spot for the Rio Olympics. Tickets are available from www.ticketmaster.ie/sevens.
Tadhg Furlong reflects on a disappointing day for Ireland against South Africa. However, he will take positives from his first Test start and be ready to build for the final match of the series in Port Elizabeth.
Paddy Jackson is preparing for Ireland's second Test against South Africa on Saturday (kick-off 5pm local time/4pm Irish time). The Ulster out-half has been checking out Ellis Park in advance of the match.
Nicole Cronin, the inaugural Irish Women's Sevens Player of the Year in 2014, is looking to make an impact on her return to the green jersey at this weekend's Rugby Europe Women's Sevens Grand Prix Series in Kazan, Russia.
The Ireland Women's 15-a-side captain Niamh Briggs was part of the Irish Development team that won the Amsterdam 7s title recently. Next up is the Rugby Europe Grand Prix Series in Kazan, Russia this weekend and then a shot at Olympic Sevens qualification at UCD on June 25-26.
Experienced prop Andrew Porter speaks about the Ireland Under-20s' preparations for the World Rugby U-20 Championship and their opening pool encounter with Wales in Manchester later today (kick-off 5.30pm, live on TG4/Sky Sports 1).