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.
Singles main draw entrants
Seeds
1 Rankings as of 31 May 2021.Other entrants
The following players received a wildcard into the singles main draw:The following players received entry using protected rankings:
The following players entered the singles main draw through qualification:
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