Domínguez akahwina menduru yesirivheri neSpain pa2018 FIBA U16 European Championship muSerbia, aine avhareji yemapoinzi 8.9. Pa2019 FIBA U16 European Championship muItaly, akatumidzwa zita remutambi anokosha kwazvo mushure mekuenzanisa 13.4 mapoinzi, 3.4 rebounds uye 2.3 anobatsira pamutambo uye achitungamira Spain kuenda kumenduru yegoridhe. Domínguez akatungamira timu yake kunzvimbo yechishanu pa2021 FIBA Under-19 World Cup
muLatvia, avhareji yemapoinzi 18.7, 2.9 rebounds uye 2.4 inobatsira pamutambo.