received entry from the singles qualifying draw: Ana Bogdan Alizé Cornet Kaia Kanepi Allie Kiick Viktória Kužmová Varvara Lepchenko Tatjana Maria Petra Martić Rebecca Peterson Aliaksandra Sasnovich Ajla Tomljanović Stefanie Vögele The following player received entry as a lucky loser: Camila Giorgi Withdrawals Before the tournament Mihaela Buzărnescu → replaced by Danielle Collins Dominika Cibulková → replaced by Tímea Babos Maria Sharapova → replaced by Kateřina Siniaková Venus Williams → replaced by Camila Giorgi Zhang Shuai → replaced by Aleksandra Krunić Retirements Caroline Wozniacki WTA doubles main-draw entrants Seeds Rankings are as of August 6, 2018 Other entrants The following pairs received wildcards into the doubles main draw: Jennifer Brady / Caroline Dolehide Lauren Davis / Nicole Gibbs The following pair received entry as alternates: Kaitlyn Christian / Sabrina Santamaria Withdrawals Before the tournament Ashleigh Barty Retirements Bethanie Mattek-Sands Champions Men's singles Novak Djokovic def. Roger Federer, 6–4, 6–4 Women's singles Kiki Bertens def. Simona Halep, 2–6, 7–6(8–6), 6–2 Men's doubles Jamie Murray / Bruno Soares def. Juan Sebastián Cabal / Robert Farah, 4–6, 6–3, [10–6] Women's doubles Lucie Hradecká / Ekaterina Makarova def. Elise Mertens / Demi Schuurs, 6–2, 7–5 References External links 2018 ATP World Tour 2018 WTA Tour 2018 Cincinnati August 2018 sports events in the United States