In 2018–19 season, Vildoza's role in the team increased and so did his stats as he averaged 9.1 points and 3.8 assists over 34 games of the EuroLeague. In March 2019, Vildoza signed a contract extension with Baskonia to stay until the end of 2023–24 season. In the Spanish League, he appeared in 32 games, averaging 9.3 points per game. In ACB Playoffs Quarterfinals, Baskonia lost with 2–0 to Zaragoza.
In 2019, he took part in the team that won the Pan American gold medal in Lima. Vildoza was included in the Argentine squad for the 2019 FIBA Basketball World Cup and clinched silver medal with Argentina which emerged as runners-up to Spain at the 2019 FIBA Basketball World Cup.