Petra Martić Petra Martić (; born 19 January 1991) is a Croatian professional tennis player. She has a career-high WTA rankings, singles ranking of world No. 14, achieved in January 2020. Martić has won two singles titles on the WTA Tour, one singles and o ...

was the defending champion, but chose to compete at the 2021 Western & Southern Open instead.

Clara Tauson Clara Tauson (born 21 December 2002) is a Danish professional tennis player. Her career-high rankings are world No. 21 in singles, achieved on 3 March 2025 and No. 124 in doubles, on 16 June same year. Tauson has won three WTA Tour titles, all o ...

won the title, defeating wildcard

Emma Raducanu Emma Raducanu ( , ; born 13 November 2002) is a British professional tennis player. She reached a career-high singles ranking of world No. 10 by the Women's Tennis Association, WTA, and is the current British No. 1. Raducanu was the 2021 US Ope ...

in the final, 6–1, 2–6, 6–4.

Seeds

Draw

Finals

Top half

Bottom half

Qualifying

Seeds

Qualifiers

Draw

First qualifier

Second qualifier

Third qualifier

Fourth qualifier

References

External links

Main DrawQualifying Draw
{{DEFAULTSORT:2021 Chicago Challenger - Singles Chicago Challenger - Singles

2021 Singles 1 (one, unit, unity) is a number, numeral, and glyph. It is the first and smallest positive integer of the infinite sequence of natural numbers. This fundamental property has led to its unique uses in other fields, ranging from science to ...