Born in Ljubljana, Dončić shone as a youth player for Union Olimpija, before joining the youth academy of the Spanish club, Real Madrid, at age 13 in 2012. He debuted in the senior side at age 16, the youngest in club history. Two years later, he led Madrid to the 2018 EuroLeague title, winning the EuroLeague MVP and EuroLeague Final Four MVP awards. He was also named the ACB Most Valuable Player, and won back-to-back EuroLeague Rising Star and ACB Best Young Player awards. In 2018, Dončić declared for the NBA draft and joined the Dallas Mavericks in the United States. [note 1] Dončić was selected unanimously to the NBA All-Rookie First Team and won Rookie of the Year for the 2018–19 season.