Tuhia he haere tonu mo tenei whitianga - I wikitoria a Domínguez i te mētara hiriwa me Spain i te 2018 FIBA U16 European Championship i Serbia, he toharite 8.9 tohu. I te 2019 FIBA U16 European Championship i Itari, i whakaingoatia ia hei kaitakaro tino nui i muri i te toharite 13.4 tohu, 3.4 rebounds me 2.3 awhina mo ia keemu me te arahi i a Spain ki te mētara koura. I arahi a Domínguez i tana kapa ki te tuarima o nga waahi i te 2021 FIBA Under-19 World Cup
i Latvia, i te toharite 18.7 tohu, 2.9 rebounds me 2.4 āwhina ia kēmu.