Wrexham defender Mike Williams gave Wales Under-21s victory against Cyprus in their friendly at Port Talbot.
Manager Brian Flynn used the game as a warm-up for Estonia
Winning only his second cap at this level, the 19-year-old struck just moments before half-time.
Williams produced a quality finish to control Arron Davies' left-wing corner on his chest and then volley home.
Cardiff City's Chris Gunter, at 16 years and 299 days, became the second youngest player to debut for Wales U21s while Gareth Bale, also 16, started.
Shrewsbury midfielder Dave Edwards also made his debut alongside defender Gunter and Southampton left-back Bale at the Remax Stadium.
However, manager Brian Flynn started with Bale on the left of midfield, with Gunter at right-back.
Yeovil's Dale Williams came on for his debut in the 77th minute for Craig Davies up front.
Derby defender Lewin Nyatanga holds the record for being the youngest Wales Under-21 cap, at 16 years 174 days when facing Germany in Wrexham on February 2005.
Nyatanga went on to become the youngest senior Wales cap as well, when he played against Paraguay in Cardiff on St David's Day 2006 aged 17 years and 195 days.
Wales U21s' next match is the second leg of a Uefa Championship qualifier against Estonia at Wrexham on 24 May.
Wales U21 boss Brian Flynn: "It was a pretty good goal from Mike, he controlled it well and then dispatched it perfectly with his left foot, a good goal at just the right time before the break.
"But I felt that he and Morgan were outstanding at the back. We had a lot of changes in our side and it needed some experience and cool heads in there, and that's what Mike and Craig produced.
"They protected goalkeeper Sam Pearce and helped a lot of the younger players through the game.
"Dave Edwards showed a lot of courage and directness from the middle.
"His strength is being able to surge forward into the box and I was very pleased with his performance, as I was with Bale and Gunter."
Wales U21: Sam Pearce (Bristol City), Chris Gunter (Cardiff City), Rhoys Wiggins (Crystal Palace), Matthew Crowell (Wrexham), Craig Morgan (MK Dons), Mike Williams (Wrexham), Simon Spender (Wrexham), Dave Edwards (Shrewsbury Town), Gareth Bale (Southampton), Craig Davies (Hellas Verona), Arron Davies (Yeovil Town).
Subs: Kyle Critchell (Southampton), Rob Davies (WBA), Lloyd James (Southampton), Curtis McDonald (Cardiff City), Dale Williams (Yeovil Town), Ramon Calliste (Liverpool), Kyle Letheren (Unattached).
Cyprus U21: Dimitris Stylianou, Loukas Stylianou, Merkis, Paraskevas Christou, Georgos Panagi, Georgiades, Iona, Samaras, Eleftheriou, Solomou, Konstantinou.
Subs: Elia, Dimitriou, Kakoullis, Christodoulou, Efthimiou, George Stylianou, Kamarlingos.
Referee: Ceri Richards (Wales).