Tulis hiji continuation for this paragraph - Domínguez meunang medali pérak jeung Spanyol di 2018 FIBA U16 Championship Éropa di Sérbia, averaging 8.9 titik. Dina 2019 FIBA U16 European Championship di Italia, anjeunna dingaranan pamuter paling berharga saatos rata-rata 13,4 poin, 3,4 rebound sareng 2,3 assists per pertandingan sareng mingpin Spanyol pikeun medali emas. Domínguez mingpin timna ka tempat kalima di Piala Dunia FIBA U-19 2021
di Latvia, rata-rata 18,7 poin, 2,9 rebound jeung 2,4 assists per game.