2019 US Open Series
In tennis, the 2019 US Open Series was the sixteenth edition of the US Open Series, which comprised a group of hard court tournaments that started on July 22, 2019 in Atlanta and concluded in Winston-Salem on August 25, 2019. This edition consisted of four separate men's tournaments and two women's tournaments, with the Western & Southern Open hosting both a men's and women's event. The series was headlined by two ATP Tour Masters 1000 and two WTA Premier 5 events.
Tournament Schedule
| Week | Date | Men's Events | Women's Events |
| 1 | July 22 – July 28 | Atlanta BB&T Atlanta Open 2019 Champion:  Alex de Minaur | No Series Event Held This Week |
| 2 | July 29 – August 4 | Washington, D.C. Citi Open 2019 Champion: Nick Kyrgios | San Jose Silicon Valley Classic 2019 Champion:  Zheng Saisai |
| 3 | August 5 – August 11 | Montreal Rogers Cup presented by National Bank 2019 Champion:  Rafael Nadal | Toronto Rogers Cup presented by National Bank 2019 Champion:  Bianca Andreescu |
| 4 | August 12 – August 18 | Cincinnati Western & Southern Open 2019 Champion:  Daniil Medvedev | Cincinnati Western & Southern Open 2019 Champion:  Madison Keys |
| 5 | August 19 – August 25 | Winston-Salem Winston-Salem Open 2019 Champion:  Hubert Hurkacz | No Series Event Held This Week |
| 6–7 | August 26 – September 8 | New York US Open 2019 Champion: Rafael Nadal | New York US Open 2019 Champion: Bianca Andreescu |
Week 1
ATP – BB&T Atlanta Open
was the defending champion, but he lost in the second round to Reilly Opelka.Alex de Minaur won the title, defeating Taylor Fritz in the final, 6–3, 7–6.
Main Draw Finals
Week 2
ATP – Citi Open (Washington, D.C.)
was the two-time defending champion but chose not to defend his title.Nick Kyrgios won the title, defeating Daniil Medvedev in the final 7–6, 7–6.
Main Draw Finals
WTA – Silicon Valley Classic (San Jose)
was the defending champion, but lost to Daria Kasatkina in the first round.Zheng Saisai won the title, defeating Aryna Sabalenka in the final, 6–3, 7–6.
Main Draw Finals
Week 3
ATP – Rogers Cup (Montreal)
was the defending champion and successfully defended his title by defeating Daniil Medvedev 6−3, 6−0 in the final.Main Draw Finals
WTA – Rogers Cup (Toronto)
was the defending champion, but she retired in the quarterfinals against Marie Bouzková.Bianca Andreescu won the title, defeating Serena Williams in the final 3–1, ret., becoming the first Canadian to win the event since 1969.
Main Draw Finals
Week 4
ATP – Western & Southern Open (Cincinnati)
was the defending champion, but lost in the Semifinals to Daniil Medvedev.Medvedev went on to win his first ATP Masters 1000 title, defeating David Goffin in the final, 7–6, 6–4.
Main Draw Finals
WTA – Western & Southern Open (Cincinnati)
was the defending champion, but lost in the second round to Venus Williams.Madison Keys won the title, defeating Svetlana Kuznetsova in the final, 7–5, 7–6.
Main Draw Finals
Week 5
ATP – Winston-Salem Open
was the defending champion, but chose not to participate this year.Hubert Hurkacz won his first ATP Tour title, defeating Benoît Paire in the final, 6–3, 3–6, 6–3.
Main Draw Finals
Weeks 6–7
ATP – US Open (New York)
was the defending champion, but he retired in the fourth round against Stan Wawrinka.Rafael Nadal won the title, defeating Daniil Medvedev in the final, 7–5, 6–3, 5–7, 4–6, 6–4.
Main Draw Finals
WTA – US Open (New York)
was the defending champion, but she was defeated in the fourth round by Belinda Bencic.Bianca Andreescu won the title, defeating Serena Williams in the final, 6–3, 7–5.