Juniors On the
ITF Junior Circuit, Zavatska had a career-high ranking of No. 13, achieved on 18 July 2016. She reached the quarterfinals of the
2016 French Open girls' singles, losing to eventual champion
Rebeka Masarova.
Professional Zavatska made her
WTA Tour main-draw debut at the
2017 Malaysian Open, where she was given a wildcard but lost in the first round to
Magda Linette. She won her first WTA Tour match at the
2018 Morocco Open, where she beat wildcard
Diae El Jardi in straight sets. She went on to win her second-round match in three sets against
Alexandra Dulgheru. Zavatska made her Grand Slam tournament main-draw debut at the
2020 US Open, losing to 11th seed
Elena Rybakina in straight sets. At the
2020 French Open, which had been moved to September due to the
COVID-19 pandemic, she lost in the first round to fifth seed
Kiki Bertens in a match that went to a deciding set, during which she ran out of rackets due to broken strings and had to borrow one from her coach. Zavatska qualified for the
2021 French Open, but went out in the opening round to 17th seed
Maria Sakkari. At the
2024 Swedish Open, Zavatska reached the quarterfinals with wins over
Yuliia Starodubtseva and fourth seed
Anna Karolína Schmiedlová, before losing to
Louisa Chirico. Partnering with
Tara Würth, she was runner-up in the doubles at the
2024 WTA 125 Cali Open, losing to top seeds
Veronika Erjavec and
Kristina Mladenovic in the final. In Ukraine's
2024 Billie Jean King Cup play-offs tie against Austria, Zavatska defeated
Julia Grabher to square the contest at 2–2, before partnering with
Nadiia Kichenok to overcome
Sinja Kraus and
Tamira Paszek in the deciding doubles match. ==Performance timeline==