While still playing mostly in tournaments of the ITF Circuit in singles, she had her breakthrough in doubles by winning her first career title in 2021 and debuting in the top 100.

Together with Viktória Kužmová and Tamara Kupková, she reached the final in 2014, when they lost to the United States team (CiCi Bellis, Tornado Alicia Black, Sofia Kenin).

[4] In December, she was successful in her third attempt in a WTA Challenger final, winning the title at the Open Angers alongside Greet Minnen, after beating Vera Zvonareva and Monica Niculescu.

[citation needed] Alongside Ulrikke Eikeri, Mihalíková won the doubles title at the WTA 125 Contrexeville in July, with a win in the final over Han Xinyun and Alexandra Panova.

[11] In November, Mihalíková partnered Viktória Hrunčáková to win the deciding doubles match against the USA pair of Taylor Townsend and Ashlyn Krueger that saw Slovakia qualify for the Billie Jean King Cup quarterfinals.

[12][13] The pair then repeated the feat in the semifinals by overcoming Nicholls and Heather Watson as Slovakia defeated Great Britain to make it into the final for the first time since 2002.