[5][6] At the 2014 Gym Festival Trnava, she won the silver medal in the team event and in the all-around behind Russian gymnast Angelina Simakova.

She made her senior international debut at the Gym Festival Trnava where she finished seventh in the all-around and placed fifth in the balance beam final.

[23] At the Gym Festival Trnava, she won silver medals on the vault and on the floor exercise and finished fourth in the all-around.

[26] At the World Cup in Paris, she finished sixth on the vault and the balance beam, and she won the bronze medal on the floor exercise.

[27] She was then selected to the Czech team for the World Championships along with Eliska Firtova, Sabina Halova, Lucie Jirikova, and Dominika Ponizilova.

[33] She then competed at the World Cup in Paris where she finished fourth on vault and won the bronze medal on the floor exercise.

[34] She was selected to compete at the World Championships along with Sandra Jessenova, Lucie Jirikova, Anna Maria Kanyai, and Dominika Ponizilova.

[35][2] Holasová competed at the 2020 World Cup in Szombathely and finished eighth on vault, and she won a bronze medal on the balance beam.

[36] She then competed at the 2020 European Championships along with Natalie Brabcova, Magdalena Coufalova, Sabina Halova, and Dominika Ponizilova.