This was the first edition of the tournament.

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 ...

won the title, defeating

Mona Barthel Mona Barthel (born 11 July 1990) is a German tennis player. On 18 March 2013, she reached her best singles ranking of world No. 23. On 14 September 2015, she peaked at No. 63 in the doubles rankings. Barthel has won four singles and three double ...

in the final, 6–4, 6–1.

Seeds

Draw

Finals

Top half

Bottom half

Qualifying

Seeds

Qualifiers

Qualifying draw

First qualifier

Second qualifier

Third qualifier

Fourth qualifier

Fifth qualifier

Sixth qualifier

External links

Main DrawQualifying Draw
{{DEFAULTSORT:2018 Oracle Challenger Series - Chicago - Women's Singles Oracle Challenger Series - Chicago - Singles Oracle Challenger Series – Chicago