Goalkeeper Rihards Matrevics started for Latvia U19 in their UEFA U19 Elite Round Qualification match with England U19 on Saturday, with the shot-stopper and his teammates falling to a 3-0 defeat.
The 19-year-old, earning his 18th international appearance at this level, saw his side in at half-time a goal behind, thanks to a Mason Mount finish, Mount would double his personal tally, while Eddie Nketiah also got on the scoresheet, to hand Latvia the loss.
Matrevics was one of four West Ham United Academy players who could have potentially played in Saturday's internationals.
Midfielder Domingos Quina was a late substitute for the Portugal U19s as they claimed a 1-0 victory against Slovakia U19s. The 18-year-old, who has played ten times in Premier League 2 this campaign and also featured for the senior side in FA Cup contest with Wigan Athletic, was brought on with just under ten minutes remaining to earn his 13th cap at U19s level for Portugal.
Elsewhere, Conor Coventry was also an unused substitute for the Republic of Ireland U19 in their Qualification match with Kosovo. The midfielder was on the bench as his teammates claimed a 3-0 victory, with Michael Obafemi and Lee O'Connor putting the home side two goals up in the first half. Rowan Roache secured the win in the second period.
At U17s' level, Kristijan Belic's Serbia side were bested 2-1 at home to Ukraine in a UEFA Elite Round Qualifier. The Serbs had taken the lead thanks to a goal from Bogdan Jocic but Danylo Sikan and Mykhailo Mudryk secured the result for Ukraine.
The 16-year-old, who played the full 90 minutes for his side in Saturday's match, has played six times for West Ham's U18s this season, and also came off the bench in an U23s fixture against Swansea City in January.