In 2014, Mihalíková reached final in Girls" doubles at United States Open, partnering Vera Lapko
Together with Viktória Kužmová and Tamara Kupková they reached final, where they lost to United States of America (CiCi Bellis, Tornado Alicia Black, Sofia Kenin). Mihalíková entered doubles competition at 2015 Australian Open again alongside Lapko. They lost in quarterfinals to the eventual winners Miriam Kolodziejová and Markéta Vondroušová.
At the 2016 Australian Open, Mihalikova wion the Girls" Doubles event with Anna Kalinskaya and was the runner up in the Girls" Singles event after losing to Vera Lapko.
Singles: 3 (3–0)
Doubles: 2 (0–2)