David Okagbue and George Nevett were both in action for their countries on Tuesday while a former Posh star featured for Jamaica in their defeat to DR Congo.
Peterborough United defender David Okagbue helped the Republic of Ireland Under 21s to a 1-0 victory in Kazakhstan on Tuesday afternoon, while fellow centre back George Nevett was in the Wales Under 21 side that were beaten 4-0 by Denmark.
Jimmy-Jay Morgan returned to training earlier this week following his exploits with the England Men's Under 20 squad.
Meanwhile former Posh defender Emmanuel Fernandez scored for Nigeria in their 2-2 draw in Jordan, while Ephron Mason-Clark was on the losing side as Jamaica were beaten 1-0 by DR Congo, who have now qualified for this summer's World Cup.