With the first group of international matches in the books, here’s a round-up of how each player got on.
Celtic have a total of 33 players heading on international duty, including 18 first-team players and 15 youngsters.
With the European Championships just around the corner, international managers will be preparing their squad for the upcoming tournament in France during the friendly games.
Other managers have the opportunity to prepare for the World Cup qualification and experiment with their squad.
There is also a host of Under-21 players in the squad for their nations European Championship qualifiers.
Many of the first-team players involved will play vital roles in their own teams success and others will be hoping to get a chance to prove themselves for their respective countries for future tournaments.
Here’s a round-up of all the Celtic players on international duty and how they got on.