In 2023, Fullana finished her last collegiate season with 14 wins and 5 losses in singles and was a finalist for Big South Player of the Year.

[5] 2023 In 2023, Luiza Fullana showed improvement in her career with a run in the ITF W15 tournament in Jackson, USA, where she advanced to the round of 16 before losing.

In the final, Fullana was leading against Italy's Giorgia Pedone, the top seed and 264th in the world, 6-0, 2-2 when her opponent retired due to a right thigh injury.

[8] Her run in São Paulo included a victory over Aurora Zantedeschi of Italy in the semifinals, where Fullana saved nine match points.

[23][24] In addition to her tennis career, Fullana is an active advocate for social projects aimed at including young people in sports in Brazil.