[7][8] In 2020, Jiménez Kasintseva won the Australian Open girls' singles title as the youngest player in the draw, defeating Weronika Baszak in the final.

- Singles: - Doubles: At the age of 15, Jiménez Kasintseva made her WTA Tour main-draw debut as a wildcard at the 2021 Madrid Open.

[15][16] In 2022, she recorded her first WTA Tour wins at the Korea Open as a lucky loser over Chloe Paquet and eighth seed Rebecca Marino to reach her first WTA quarterfinal, where she was defeated by top seed Jeļena Ostapenko.

[26] She also received a wildcard for the main draw in Madrid, where she defeated Zhu Lin in the first round for her first WTA 1000 win,[27][28] before falling to 12th seed Jasmine Paolini.

[29] Only main-draw results in WTA Tour, Grand Slam tournaments, Fed Cup/Billie Jean King Cup and Olympic Games are included in win–loss records.