Kieffer Moore scored the only goal of the game as Wales secured a 1-0 friendly win over Mexico on Saturday.
Wales changed all 11 players from their 3-1 World Cup qualifying defeat to Belgium on Wednesday, but the new-look XI acquitted themselves superbly against a side ranked ninth in the world.
The decisive goal came after just 11 minutes, Moore controlling Jonny Williams' pass before rolling past Guillermo Ochoa.
That was Cardiff City striker Moore's fifth goal in 14 appearances for Wales – at least two more than any other Welshman since his debut in September 2019.
Hirving Lozano went close for the visitors in the second half, but Wales – for whom Chris Gunter became the first player to reach 100 appearances – held on to secure a first-ever win over Mexico at the fifth attempt.