| Date: | August 14–20 |
| Edition: | 116th (men) / 89th (women) |
| Surface: | Hard |
| Location: | Mason, Ohio, United States |
| Venue: | Lindner Family Tennis Center |
| Category: | WTA Premier 5 (women) |
| Champms: | Grigor Dimitrov |
| Champws: |  Garbiñe Muguruza |
| Champmd: |  Pierre-Hugues Herbert / Nicolas Mahut |
| Champwd: | Chan Yung-jan / Martina Hingis |
The 2017 Western & Southern Open was a men's and women's tennis tournament played on outdoor hard courts from August 14–20, 2017.[1] It was a Masters 1000 tournament on the 2017 ATP World Tour and a WTA Premier 5 tournament on the 2017 WTA Tour.[2] [3] 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.
| Event | Round of 16 | Round of 32 | Round of 64 | width=85 | width=85 | width=85 | |||||||
| Men's singles[4] | 1000 | 600 | 360 | 180 | 90 | 45 | 10 | 25 | 16 | 0 | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Men's doubles | 0 | ||||||||||||
| Women's singles[5] | 900 | 585 | 350 | 190 | 105 | 60 | 1 | 30 | 20 | 1 | |||
| Women's doubles | 5 |
| width=130 bgcolor=dfe2e9 | Event | width=80 bgcolor=lime | W | width=85 bgcolor=thistle | F | width=85 bgcolor=ffff00 | SF | width=85 bgcolor=ffebcd | QF | width=85 bgcolor=afeeee | Round of 16 | width=85 bgcolor=afeeee | Round of 32 | width=85 bgcolor=afeeee | Round of 64 | width=85 | Q2 | width=85 | Q1 |
| style=background:#ededed | Men's singles[6] | $954,225 | $467,880 | $235,480 | $119,740 | $62,180 | $32,780 | $17,700 | $4,080 | $2,075 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| style=background:#ededed | Women's singles[7] | $522,450 | $260,970 | $128,330 | $60,105 | $29,100 | $14,965 | $7,850 | $ | $ | |||||||||
| style=background:#ededed | Men's doubles | $295,500 | $144,670 | $72,570 | $37,250 | $19,250 | $10,160 | ||||||||||||
| style=background:#ededed | Women's doubles[8] | $149,635 | $75,575 | $37,278 | $18,830 | $9,545 | $4,715 |
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.
| Seed | Rank | Player | Points before | Points defending | Points won | Points after | Status | |
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | Rafael Nadal | 7,555 | 90 | 180 | 7,645 | Quarterfinals lost to  Nick Kyrgios | |
| 7,145 | 0 | 0 | 7,145 | Withdrew due to back injury | ||||
| 3 | 8 |  Dominic Thiem | 4,030 | 180 | 180 | 4,030 | Quarterfinals lost to David Ferrer | |
| 4 | 7 | Alexander Zverev | 4,470 | 10 | 10 | 4,470 | Second round lost to  Frances Tiafoe [WC] | |
 Kei Nishikori | 3,285 | 90 | 0 | 3,205 | Withdrew due to right wrist injury | |||
 Milos Raonic | 3,230 | 360 | 0 | 2,870 | Withdrew due to left wrist injury | |||
| 7 | 11 | Grigor Dimitrov | 3,070 | 360 | 1,000 | 3,710 | Champion, defeated Nick Kyrgios | |
| 8 | 12 | Jo-Wilfried Tsonga | 2,770 | 90 | 10 | 2,690 | Second round lost to Ivo Karlović | |
| 9 | 13 |  David Goffin | 2,560 | 45 | 10 | 2,525 | First round lost to Nick Kyrgios | |
| 10 | 15 |  Tomáš Berdych | 2,390 | 90 | 10 | 2,310 | ||
| 11 | 17 | Pablo Carreño Busta | 2,305 | 10 | 90 | 2,385 | Third round lost to David Ferrer | |
| 12 | 14 | Roberto Bautista Agut | 2,425 | 10 | 10 | 2,425 | First round lost to Jared Donaldson [WC] | |
| 13 | 16 | Jack Sock | 2,335 | 0 | 10 | 2,345 | First round lost to Yūichi Sugita | |
| 14 | 19 | John Isner | 2,110 | 10 | 360 | 2,460 | Semifinals lost to Grigor Dimitrov [7] | |
| 15 | 20 | Sam Querrey | 2,060 | 10 | 45 | 2,095 | Second round lost to Adrian Mannarino | |
| 16 | 22 |  Gilles Müller | 1,885 | 0 | 45 | 1,930 | Second round lost to Albert Ramos Viñolas |
The following players received wild cards into the main singles draw:
The following players received entry from the singles qualifying draw:
Alexandr Dolgopolov Christopher Eubanks Mitchell Krueger John-Patrick Smith
Mikhail YouzhnyThe following players received entry as lucky losers:
Chung Hyeon
Kyle Edmund
Novak Djokovic (elbow injury) →replaced by Borna Ćorić[9]
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 Benoît Paire| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
 Finland | Henri Kontinen | Australia | John Peers | 5 | 1 | |
 Poland | Łukasz Kubot |  Brazil | Marcelo Melo | 5 | 2 | |
| United Kingdom | Jamie Murray | Brazil | Bruno Soares | 11 | 3 | |
| Bob Bryan | Mike Bryan | 14 | 4 | |||
| France | Pierre-Hugues Herbert | France | Nicolas Mahut | 22 | 5 | |
| Raven Klaasen | Rajeev Ram | 27 | 6 | |||
| India | Rohan Bopanna | Ivan Dodig | 31 | 7 | ||
| Austria | Oliver Marach | Mate Pavić | 34 | 8 |
The following pairs received wildcards into the doubles main draw:
The following players received wild cards into the main singles draw:
The following players received entry from the singles qualifying draw:
Françoise Abanda Ashleigh Barty Camila Giorgi Beatriz Haddad Maia Aleksandra Krunić Varvara Lepchenko Magda Linette
Aliaksandra Sasnovich Taylor TownsendThe following player received entry as a lucky loser:
Maria Sharapova →replaced by Natalia VikhlyantsevaThe following pair received a wildcard into the doubles main draw:
The following pair received entry as alternates:
Nick Kyrgios, 6–3, 7–5 Garbiñe Muguruza def. 
Simona Halep, 6–1, 6–0 Pierre-Hugues Herbert / Nicolas Mahut def. Jamie Murray / Bruno Soares, 7–6(8–6), 6–4 Monica Niculescu, 4–6, 6–4, [10–7]
Slovakia
China
Hungary