| Date: | August 12–18 |
| Edition: | 118th (men) / 91st (women) |
| Surface: | Hard |
| Location: | Mason, Ohio, United States |
| Venue: | Lindner Family Tennis Center |
| Category: | WTA Premier 5 (women) |
| Champms: |  Daniil Medvedev |
| Champws: |  Madison Keys |
| Champmd: | Ivan Dodig /  Filip Polášek |
| Champwd: |  Lucie Hradecká / Andreja Klepač |
| Main Name: | Cincinnati Open |
The 2019 Western & Southern Open was a men's and women's tennis tournament played on outdoor hard courts from August 12–18, 2019. It was a Masters 1000 tournament on the 2019 ATP Tour and a WTA Premier 5 tournament on the 2019 WTA Tour.[1] [2] The tournament was one of two headline events in the 2019 US Open Series. The 2019 tournament was the 118th men's edition and the 91st women's edition of the Cincinnati Open and took place at the Lindner Family Tennis Center in Mason, Ohio, a northern suburb of Cincinnati, in the United States.
| Event | Round of 16 | Round of 32 | Round of 64 | width=85 | width=85 | width=85 | |||||||
| Men's singles[3] | 1000 | 600 | 360 | 180 | 90 | 45 | 10 | 25 | 16 | 0 | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Men's doubles | 0 | ||||||||||||
| Women's singles[4] | 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[5] | $1,114,225 | $564,005 | $289,290 | $149,100 | $74,695 | $39,120 | $22,045 | $8,435 | $4,220 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| style=background:#ededed | Women's singles | $544,500 | $269,576 | $122,850 | $62,660 | $30,330 | $15,600 | $8,300 | $5,100 | $3,090 | |||||||||
| style=background:#ededed | Men's doubles | $331,300 | $161,680 | $81,040 | $41,280 | $21,780 | $11,660 | ||||||||||||
| style=background:#ededed | Women's doubles | $143,600 | $72,534 | $35,910 | $18,075 | $9,170 | $4,530 |
The following are the seeded players. Seedings are based on ATP rankings as of August 5, 2019. Rankings and points before are as of August 12, 2019.
| Seed | Rank | Player | Points before | Points defending | Points won | Points after | Status | |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 |  Novak Djokovic | 12,325 | 1,000 | 360 | 11,685 | Semifinals lost to Daniil Medvedev [9] | |
 Rafael Nadal | 7,945 | 0 | 0 | 7,945 | Withdrew due to fatigue | |||
| 3 | 3 | Roger Federer | 7,460 | 600 | 90 | 6,950 | Third round lost to Andrey Rublev [Q] | |
 Dominic Thiem | 4,925 | 0 | 0 | 4,925 | Withdrew due to illness | |||
| 5 | 7 | Stefanos Tsitsipas | 3,455 | 10 | 10 | 3,455 | Second round lost to Jan-Lennard Struff | |
| 6 | 5 |  Kei Nishikori | 4,040 | 45 | 10 | 4,005 | Second round lost to Yoshihito Nishioka [Q] | |
| 7 | 6 | Alexander Zverev | 4,005 | 10 | 10 | 4,005 | Second round lost to Miomir Kecmanović [Q] | |
| 8 | 9 | Karen Khachanov | 2,890 | 90 | 90 | 2,890 | Third round lost to  Lucas Pouille | |
| 9 | 8 | Daniil Medvedev | 3,230 | 35 | 1,000 | 4,195 | Champion, defeated  David Goffin [16] | |
 | 2,555 | (45)† | 0 | 2,510 | Withdrew due to ankle Injury | |||
| 11 | 11 | Roberto Bautista Agut | 2,395 | 0 | 180 | 2,575 | Quarterfinals lost to Richard Gasquet [PR] | |
| 12 | 13 | Borna Ćorić | 2,195 | 45 | 10 | 2,160 | First round lost to Reilly Opelka [WC] | |
| 13 | 16 | John Isner | 2,040 | 10 | 45 | 2,075 | Second round lost to Pablo Carreño Busta [Q] | |
| 14 | 18 | Marin Čilić | 1,940 | 360 | 10 | 1,590 | First round lost to  Radu Albot | |
| 15 | 17 |  Nikoloz Basilashvili | 2,020 | (45)‡ | 10 | 1,985 | First round lost to Andrey Rublev [Q] | |
| 16 | 19 | David Goffin | 1,815 | 360 | 600 | 2,055 | Runner-up, lost to Daniil Medvedev [9] |
† The player used an exemption to skip the tournament in 2018. Accordingly, points for his 18th best result are deducted instead.
‡ The player did not qualify for the tournament in 2018. Accordingly, points for his 18th best result are deducted instead.
The following players would have been seeded, but they withdrew from the event.
| Rank | Player | Points before | Points defending | Points after | Reason | |
|---|---|---|---|---|---|---|
| 12 | 2,230 | 180 | 2,050 | Knee Injury | ||
| 14 | 2,140 | 90 | 2,050 | Knee injury |
The following players received wild cards into the main singles draw:
The following player received entry using a protected ranking:
The following players received entry from the singles qualifying draw:
Pablo Carreño Busta Miomir Kecmanović Denis Kudla Yoshihito Nishioka Andrey Rublev
Casper RuudThe following players received entry as lucky losers:
Lorenzo Sonego
Juan Martín del Potro → replaced by 
Jordan Thompson Fabio Fognini → replaced by João Sousa Rafael Nadal → replaced by 
Mikhail Kukushkin
Milos Raonic → replaced by Grigor Dimitrov Dominic Thiem → replaced by Federico Delbonis Yoshihito Nishioka (illness)The following pairs received wildcards into the doubles main draw:
The following pairs received entry as alternates:
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Australia | Ashleigh Barty | 1 | 1 | |
| Japan | Naomi Osaka | 2 | 2 | |
| Czech Republic | Karolína Plíšková | 3 | 3 | |
 Romania | Simona Halep | 4 | 4 | |
| Kiki Bertens | 5 | 5 | ||
| Czech Republic | Petra Kvitová | 6 | 6 | |
 Ukraine | Elina Svitolina | 7 | 7 | |
| Sloane Stephens | 8 | 8 | ||
 Belarus | Aryna Sabalenka | 9 | 9 | |
| Anastasija Sevastova | 11 | 11 | ||
| Belinda Bencic | 12 | 12 | ||
| Angelique Kerber | 13 | 13 | ||
 United Kingdom | Johanna Konta | 14 | 14 | |
 China | Wang Qiang | 16 | 15 | |
| Madison Keys | 17 | 16 |
The following players received wild cards into the main singles draw:
The following players received entry from the singles qualifying draw:
Jennifer Brady Lauren Davis Zarina Diyas
Ons Jabeur Veronika Kudermetova
Rebecca Peterson Astra Sharma
Iga ŚwiątekThe following players received entry as lucky losers:
Bianca Andreescu → replaced by Monica Puig Amanda Anisimova → replaced by Barbora Strýcová Catherine Bellis → replaced by Venus Williams Danielle Collins → replaced by Viktória Kužmová Lesia Tsurenko → replaced by Wang Yafan Markéta Vondroušová → replaced by Ekaterina Alexandrova Serena Williams → replaced by Jessica Pegula Naomi Osaka (left knee injury)The following pairs received wildcards into the doubles main draw:
Jennifer Brady / Jessica Pegula Caty McNally / Alison Riske Karolína Plíšková / Kristýna Plíšková Daniil Medvedev def. David Goffin, 7–6(7–3), 6–4 Madison Keys def. Svetlana Kuznetsova, 7–5, 7–6(7–5) Filip Polášek def. 
Juan Sebastián Cabal / Robert Farah, 4–6, 6–4, [10–6] Lucie Hradecká / Andreja Klepač def. Anna-Lena Grönefeld / Demi Schuurs, 6–4, 6–1
Brazil
New Zealand
Finland