In a curtain-raiser to the South Africa-New Zealand Tri-Nations match in Durban, Wales Under-19's lost 20-19 to a South African Schools Academy team.
"We outscored them by three tries to two and it was a game we should have won," said coach Dai Rees. "But we started poorly and gave away too much possession. Given a few more minutes we would have won."
The home side led 13-0 before fly half Matthew Jones dropped a goal and wing Richard Fussell scored a try.
However, it was 21-8 before wing Stephen Ireland and centre Gavin Evans crossed for tries and centre Lee Thomas added one conversion.
A late run by Fussell was halted in the corner flag and Wales just lost out.
The final two matches are against Northern Transvaal on Wednesday and then the SA Schools at Johannesburg on Saturday, the latter being a curtain-raiser to the South Africa-Australia Tri-Nations match.
WRU International Skills Coach Jason Strange is a busy man, combining the new role with that of Wales Under 20 attack coach, Ebbw Vale head coach and continuing to teach at Ebbw Fawr Learning Community.
Warren Gatland and Sam Warburton look ahead to this week's crunch RBS 6 Nations tie against France, where the Wales skipper in particular is keen to make his mark, as Paris has proved a bleak place for him in the past.
Following their historic win over England, Wales Under 20 suffered a narrow, 36-34 loss to their Scottish counterparts last weekend, despite outscoring them by five tries to three. Watch the match highlights and reaction.
WRU TV go behind the scenes with the Wales squad as they put the final touches in place ahead of the clash against Scotland at Murrayfield. Follow the squad on their captain's run, the kickers visit to Murrayfield and Neil Jenkins' press conference