2021 Chicago Challenger

The 2021 Chicago Challenger was a professional tennis tournament played on outdoor hard courts. It was part of the 2021 WTA 125K series. It was the second edition of the tournament which took place from August 16 to 22, 2021 in Chicago, United States.

Singles

 * Clara Tauson def. 🇬🇧 Emma Raducanu, 6–1, 2–6, 6–4

Doubles

 * 🇯🇵 Eri Hozumi / 🇹🇭 Peangtarn Plipuech def. 🇩🇪 Mona Barthel /  Hsieh Yu-chieh, 7–5, 6–2

Seeds

 * 1 Rankings are as of 9 August 2021.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇺🇸 Hailey Baptiste
 * 🇺🇸 Whitney Osuigwe
 * 🇬🇧 Emma Raducanu
 * 🇺🇸 CoCo Vandeweghe

The following players received entry using protected rankings:
 * 🇷🇸 Ivana Jorović
 * 🇺🇦 Kateryna Kozlova

The following players received entry from the qualifying draw:
 * 🇬🇧 Harriet Dart
 * 🇷🇺 Vitalia Diatchenko
 * 🇺🇸 Caroline Dolehide
 * 🇧🇪 Maryna Zanevska

Withdrawals

 * Before the tournament
 * 🇩🇪 Mona Barthel → replaced by 🇫🇷 Harmony Tan
 * 🇯🇵 Nao Hibino → replaced by Ana Konjuh
 * 🇪🇪 Kaia Kanepi → replaced by 🇷🇺 Anna Kalinskaya
 * 🇺🇦 Marta Kostyuk → replaced by 🇪🇸 Nuria Párrizas Díaz
 * 🇷🇺 Anastasia Potapova → replaced by 🇩🇪 Jule Niemeier
 * 🇷🇸 Nina Stojanović → replaced by 🇧🇪 Greet Minnen

Seeds

 * Rankings are as of 9 August 2021

Other entrants
The following pair received a wildcard into the doubles main draw:
 * 🇺🇸 Abigail Forbes / 🇺🇸 Dalayna Hewitt

The following pairs received entry into the doubles main draw using protected rankings:
 * 🇩🇪 Mona Barthel / Hsieh Yu-chieh
 * Beatrice Gumulya / Aldila Sutjiadi

Withdrawals

 * Before the tournament
 * 🇯🇵 Eri Hozumi / 🇷🇺 Valeria Savinykh → replaced by 🇯🇵 Eri Hozumi / 🇹🇭 Peangtarn Plipuech