2021 Bol Open

The 2021 Bol Open was a professional tennis tournament played on outdoor clay courts. It was the fifteenth edition of the tournament and part of the 2021 WTA 125K series. The tournament could not be held in 2020 due to the COVID-19 pandemic. It took place in Bol, Croatia, from 7 to 12 June 2021.

Seeds

 * 1 Rankings as of 31 May 2021.

Other entrants
The following players received a wildcard into the singles main draw:
 * Jana Fett
 * Ana Konjuh
 * Tena Lukas
 * Tereza Mrdeža

The following players received entry using protected rankings:
 * 🇷🇴 Alexandra Dulgheru
 * 🇦🇺 Priscilla Hon

The following players entered the singles main draw through qualification:
 * 🇷🇴 Alexandra Cadanțu
 * 🇭🇺 Dalma Gálfi
 * Ekaterine Gorgodze
 * Lulu Sun

Withdrawals

 * Before the tournament
 * 🇨🇦 Eugenie Bouchard → replaced by 🇧🇪 Ysaline Bonaventure
 * 🇮🇹 Elisabetta Cocciaretto → replaced by 🇷🇴 Irina Bara
 * 🇷🇺 Varvara Gracheva → replaced by 🇲🇽 Renata Zarazúa
 * 🇷🇺 Anna Kalinskaya → replaced by 🇧🇾 Olga Govortsova
 * 🇲🇪 Danka Kovinić → replaced by 🇦🇺 Priscilla Hon
 * 🇺🇸 Bernarda Pera → replaced by 🇺🇸 Usue Maitane Arconada
 * 🇸🇪 Rebecca Peterson → replaced by 🇺🇦 Katarina Zavatska
 * 🇪🇸 Sara Sorribes Tormo → replaced by 🇵🇱 Katarzyna Kawa
 * 🇷🇴 Patricia Maria Țig → replaced by 🇦🇹 Barbara Haas
 * 🇨🇳 Zhu Lin → replaced by 🇺🇸 Claire Liu
 * Tamara Zidanšek → replaced by 🇪🇸 Nuria Párrizas Díaz

Retirements

 * 🇧🇪 Greet Minnen
 * 🇺🇦 Katarina Zavatska

Seeds

 * 1 Rankings as of 31 May 2021.

Singles

 * 🇮🇹 Jasmine Paolini def. Arantxa Rus 6–2, 7–6(7–4)

Doubles

 * 🇪🇸 Aliona Bolsova / 🇵🇱 Katarzyna Kawa def. Ekaterine Gorgodze / 🇸🇰 Tereza Mihalíková 6–1, 4–6, [10–6]