Kazeem Olaigbe and Matt Carson will represent Belgium and Northern Ireland Under-19s respectively during this month's International break.
Southampton B team's top goalscorer Olaigbe will join up with Belgium this month, as part of the UEFA Under-19s European Championship elite round.
Between 23rd and 29th of March, Belgium will take on Italy, Germany and hosts Finland in Group 5, with the winners looking to book their place at the final tournament in April at X-Bionic Sphere in Šamorín-Čilistov.
Elsewhere Under-18s regular Carson will represent Northern Ireland's Under-19s at the 2022 Football Federations Cup in Spain.
The action starts with a clash with Norway on 23rd March, before facing Belgium and Czech Republic on March 25th and 28th.