Athinaiou was a member of the Greek university national team. 2007 World University Games. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ <unk> <unk> <unk>
2016 Turin FIBA World Olympic Qualifying Tournament. He also played at the 2019 FIBA World Cup qualification, where he had a game-winning buzzer-beating 3 pointer against Great Britain.