Kọ́kọ́ parí gbólóhùn tó wà nísàlẹ̀ yìí: Kottas ti jẹ́ ọmọ ẹgbẹ́ agbábọ́ọ̀lù orílẹ̀-èdè Gíríìsì fún àwọn ọmọdé. Pẹlu awọn ẹgbẹ orilẹ-ede ọdọ ti Greece, o dun ni 2012 FIBA European Under-16 Championship, ati awọn mejeeji 2013 ati 2014 FIBA European Under-18 Championships. 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.