Kọ́kọ́ parí gbólóhùn tó wà nísàlẹ̀ yìí: Stamatis jẹ́ ọ̀kan lára àwọn ọ̀dọ́ tó ń ṣeré ìdárayá fún orílẹ̀-èdè Gíríìsì. Pẹlu awọn ẹgbẹ orilẹ-ede ọdọ ti Greece, o dun ni diẹ ninu awọn ere-idije wọnyi: 2011 FIBA Europe Under-16 Championship, 2012 FIBA Europe Under-16 Championship, 2013 FIBA Europe Under-18 Championship, 2014 FIBA Europe Under-18 Championship. O tun dun ni awọn
2015 FIBA Under-19 World Cup, 2015 FIBA Europe Under-20 Championship, àti 2nd division 2016 FIBA Europe Under-20 Championship Division B, níbi tí ó ti gba àmì ẹ̀yẹ idẹ.