Kọ́kọ́ parí gbólóhùn yìí: Peno jẹ́ ọ̀kan lára àwọn ọ̀dọ́ tó ń ṣeré ìdárayá fún orílẹ̀-èdè Serbia. Pẹlu awọn ọmọ ẹgbẹ orilẹ-ede ti Serbia, o ti dun ni awọn ere-idije wọnyi: 2012 FIBA Europe Under-16 Championship, nibi ti o ti gba ami idẹ, 2013 FIBA Europe Under-16 Championship, nibi ti o ti gba ami fadaka ati ti dibo si Ẹgbẹ Gbogbo-ije ati orukọ MVP, 2014 FIBA Europe Under-18 Championship, nibi ti o ti gba ami fadaka, 2014 FIBA Under-17 World Championship, nibi ti o ti gba ami idẹ,
2015 FIBA Under-19 World Championship, àti 2016 FIBA Europe Under-20 Championship.