U21 International problems

Not sure if this is an issue or it is deliberate but anyway, here goes.

I am in my second season with Dundee United. It's early doors, only September and I am having an issue.

You see, I am trying to build a squad of players for little money and this mean bringing through youngsters. So on the eve of a Europa League fixture versus Hannover, picture my dismay as 3 of my first team regulars are called up to play in an U21 game.

As it's not a friendly, I can't pull them out. This also happened last season when I lost 5 guys.

I am now being put at a disadvantage in what will already be a tough game.

I will also be without the 3 for a league game the following weekend.

Surely this wouldn't happen irl as there would be serious clashes between the clubs and FA's due to important club fixtures.