2021 Chicago Women's Open
The 2021 Chicago Women's Open was a tennis tournament held in Chicago, Illinois for female professional tennis players, and part of the 2021 WTA Tour. It was played on outdoor hard courts in the week prior to the 2021 U.S. Open. This marked the first time since 1997 that a WTA tournament was held in Chicago.
The 2021 Chicago Women's Open was a tennis tournament held in Chicago, Illinois for female professional tennis players, and part of the 2021 WTA Tour. It was played on outdoor hard courts in the week prior to the 2021 U.S. Open. This marked the first time since 1997 that a WTA tournament was held in Chicago.

Champions
Singles
Elina Svitolina def.  Alizé Cornet, 7–5, 6–4.This was Svitolina's sixteenth WTA Tour singles title, and first of the year.

Doubles
Nadiia Kichenok /  Raluca Olaru def.  Lyudmyla Kichenok /  Makoto Ninomiya, 7–6(8–6), 5–7, [10–8].

Singles main draw entrants
Seeds
Rankings are as of August 16, 2021.

Other entrants
The following players received wildcards into the main draw:

 Françoise Abanda
 Katherine Sebov
 Elina Svitolina
 Venus WilliamsThe following players received entry from the qualifying draw:

 Ana Bogdan
 Zarina Diyas
 Quinn Gleason
 Aldila SutjiadiThe following player received entry as a lucky loser:

 Clara Burel

Withdrawals
Before the tournament Camila Giorgi → replaced by  Clara Burel
 Andrea Petkovic → replaced by  Varvara Gracheva
 Elena Rybakina → replaced by  Misaki Doi
 Ajla Tomljanović → replaced by  Fiona Ferro

Doubles main draw entrants
Seeds
Rankings are as of August 16, 2021.

Withdrawals
Before the tournament Anastasia Potapova /  Heather Watson → replaced by  Bárbara Gatica /  Rebeca Pereira

References
External links
Official website