Aliona Bolsova Zadoinov

Aliona Vadimovna Bolsova Zadoinova (born 6 November 1997) is a Spanish-Moldovan former professional tennis player. She reached career-high WTA rankings of No. 88 in singles and No. 54 in doubles. She won five doubles titles on the WTA Challenger Tour along with nine singles and 16 doubles titles on the ITF Circuit.

On the ITF Junior Circuit, Bolsova had a combined career-high ranking of No. 4, and reached the quarterfinals of the 2015 Australian Open.

Playing for Spain, Bolsova has a win-loss record of 5–3 in Billie Jean King Cup competition.

Personal life Bolsova moved from Moldova to Spain at a young age. Her father, Vadim Zadoinov, and her mother, Olga Bolșova, were both Olympic athletes, and so were her maternal grandparents, athletes Viktor Bolshov and Valentyna Maslovskaya.

She represented Moldova from 2012 to 2013, until she gained Spanish citizenship in 2013.

College Bolsova played for Oklahoma State University's tennis team as a freshman in the 2016–17 season in NCAA play. There, her record was 31–7 in singles and 25–7 in doubles. Her tenure included helping OSU's team reach the final of the 2017 Big 12 Conference championship and the quarterfinals of the 2017 NCAA tournament.

In 2018, Bolsova played for Florida Atlantic University, going undefeated in singles with a record of 19–0. In doubles, she went 15–3. Bolsova turned professional following the Conference USA championship of 2018. and reached the fourth round on her major debut in which she lost to Amanda Anisimova.

Partnering with Rebeka Masarova, Bolsova won the doubles draw at the 2022 Internacional de Valencia, defeating Alexandra Panova and Arantxa Rus in the final. She also won the doubles title at the 2022 Țiriac Foundation Trophy, teaming with Andrea Gámiz to overcome Réka Luca Jani and Panna Udvardy in the final.

Bolsova entered the main draw at the 2023 French Open as a lucky loser and won her first-round match against Kristína Kučová, before losing to Anna Karolína Schmiedlová.

Partnering Katarzyna Kawa, she was runner-up in the doubles at the 2024 Țiriac Foundation Trophy, losing to Carole Monnet and Darja Semeņistaja in the final.

Bolsova ended also runner-up in the doubles at the 2024 Bolivia Open, partnering with Valeriya Strakhova, and losing the final to Nuria Brancaccio and Leyre Romero Gormaz.

In November 2025, Bolsova announced her retirement from professional tennis, with her final appearance at the 2026 Catalonia Open Solgironès in April 2026.

Performance timelines

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.

Singles

Doubles

WTA Tour finals Doubles: 1 (runner-up) LegendWTA 250 (0–1)Finals by surfaceClay (0–1) ResultDateTournamentTierSurfacePartnerOpponentScoreLoss Budapest Grand Prix, Hungary WTA 250 Clay Tamara Korpatsch Mihaela Buzărnescu Fanny Stollár 4–6, 4–6

WTA 125 finals Doubles: 10 (5 titles, 5 runner-ups)

ITF Circuit finals Singles: 19 (9 titles, 10 runner-ups) LegendW80 tournaments (1–0)W60 tournaments (2–3)W25/35 tournaments (2–5)W10 tournaments (4–2)

Doubles: 26 (17 titles, 9 runner-ups) LegendW100 tournaments (1–3)W80 tournaments (2–0)W60/75 tournaments (2–3)W25/35 tournaments (4–1)W10/15 tournaments (8–2)