2017 Western & Southern Open

The 2017 Western & Southern Open was a men's and women's tennis tournament played on outdoor hard courts from August 14–20, 2017. It was a Masters 1000 tournament on the 2017 ATP World Tour and a WTA Premier 5 tournament on the 2017 WTA Tour. The tournament was one of two headline events in the 2017 US Open Series. The 2017 tournament was the 116th men's edition and the 89th women's edition of the Cincinnati Masters. The tournament was held annually at the Lindner Family Tennis Center in Mason, a northern suburb of Cincinnati, in the United States.

Marin Čilić and Karolína Plíšková were the defending champions in men's and women's singles titles. Čilić withdrew due to an adductor injury before the tournament began, while Plíšková lost in the semifinals to Garbiñe Muguruza.

Seeds
The following are the seeded players. Seedings are based on ATP rankings as of August 7, 2017. Rankings and points before are as of August 14, 2017.

Other entrants
The following players received wild cards into the main singles draw:
 * 🇺🇸 Jared Donaldson
 * 🇺🇸 Stefan Kozlov
 * 🇺🇸 Tommy Paul
 * 🇺🇸 Frances Tiafoe

The following players received entry from the singles qualifying draw:
 * 🇺🇦 Alexandr Dolgopolov
 * 🇺🇸 Christopher Eubanks
 * 🇺🇸 Mitchell Krueger
 * 🇩🇪 Maximilian Marterer
 * 🇦🇺 John-Patrick Smith
 * João Sousa
 * 🇷🇺 Mikhail Youzhny

The following players received entry as lucky losers:
 * 🇮🇹 Thomas Fabbiano
 * 🇺🇸 Christian Harrison
 * 🇮🇳 Ramkumar Ramanathan
 * 🇷🇸 Janko Tipsarević

Withdrawals

 * Before the tournament
 * Marin Čilić →replaced by 🇰🇷 Chung Hyeon
 * Pablo Cuevas →replaced by 🇬🇧 Kyle Edmund
 * 🇷🇸 Novak Djokovic (elbow injury) →replaced by Borna Ćorić
 * Roger Federer (back injury) →replaced by 🇮🇹 Thomas Fabbiano
 * 🇬🇧 Andy Murray (hip injury) →replaced by 🇷🇺 Daniil Medvedev
 * 🇫🇷 Gaël Monfils →replaced by 🇮🇳 Ramkumar Ramanathan
 * 🇯🇵 Kei Nishikori (right wrist injury) →replaced by 🇷🇸 Janko Tipsarević
 * 🇫🇷 Lucas Pouille →replaced by Nikoloz Basilashvili
 * 🇨🇦 Milos Raonic (left wrist injury) →replaced by 🇺🇸 Christian Harrison
 * 🇫🇷 Gilles Simon →replaced by 🇨🇿 Jiří Veselý
 * Stan Wawrinka (knee injury) →replaced by 🇫🇷 Benoît Paire

Seeds

 * Rankings are as of August 7, 2017

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇺🇸 Jared Donaldson / 🇺🇸 Stefan Kozlov
 * 🇺🇸 Jack Sock / 🇺🇸 Jackson Withrow

Withdrawals

 * During the tournament
 * 🇪🇸 Roberto Bautista Agut

Seeds

 * Rankings are as of August 7, 2017

Other entrants
The following players received wild cards into the main singles draw:
 * 🇫🇷 Océane Dodin
 * 🇷🇺 Maria Sharapova
 * 🇺🇸 Sloane Stephens

The following players received entry from the singles qualifying draw:
 * 🇨🇦 Françoise Abanda
 * 🇦🇺 Ashleigh Barty
 * Verónica Cepede Royg
 * 🇮🇹 Camila Giorgi
 * 🇧🇷 Beatriz Haddad Maia
 * 🇷🇸 Aleksandra Krunić
 * 🇺🇸 Varvara Lepchenko
 * 🇵🇱 Magda Linette
 * Monica Puig
 * 🇧🇾 Aliaksandra Sasnovich
 * 🇺🇸 Taylor Townsend
 * Donna Vekić

The following player received entry as a lucky loser:
 * 🇷🇺 Natalia Vikhlyantseva

Withdrawals

 * Before the tournament
 * 🇷🇺 Maria Sharapova →replaced by 🇷🇺 Natalia Vikhlyantseva
 * 🇦🇺 Samantha Stosur →replaced by 🇩🇪 Julia Görges

Seeds

 * Rankings are as of August 7, 2017

Other entrants
The following pair received a wildcard into the doubles main draw:
 * 🇺🇸 Alexa Glatch / 🇺🇸 Caty McNally

The following pair received entry as alternates:
 * 🇺🇦 Lyudmyla Kichenok / 🇺🇦 Lesia Tsurenko

Withdrawals

 * Before the tournament
 * 🇷🇺 Ekaterina Makarova

Men's singles

 * 🇧🇬 Grigor Dimitrov def. 🇦🇺 Nick Kyrgios, 6–3, 7–5

Women's singles

 * 🇪🇸 Garbiñe Muguruza def. 🇷🇴 Simona Halep, 6–1, 6–0

Men's doubles

 * 🇫🇷 Pierre-Hugues Herbert / 🇫🇷 Nicolas Mahut def. 🇬🇧 Jamie Murray / 🇧🇷 Bruno Soares, 7–6(8–6), 6–4

Women's doubles

 * Chan Yung-jan / Martina Hingis def.  Hsieh Su-wei / 🇷🇴 Monica Niculescu, 4–6, 6–4, [10–7]