# 2021 US Open Series

In tennis, the 2021 US Open Series was the eighteenth edition of the US Open Series, which comprised a group of hard court tournaments that started on July 12, 2021, in Newport.

## Tournament schedule

* Legend
* Grand Slam Event
* ATP Masters 1000 and WTA 1000
* ATP Tour 500 and WTA 500
* ATP Tour 250 and WTA 250
| Week | Date | Men's Events | Women's Events |
| 1 | July 12 – July 18 | Newport Hall of Fame Open 2021 Champion: Kevin Anderson | No Series Event Held This Week |
| 2 | July 24 – August 1 | Atlanta Truist Atlanta Open 2021 Champion: John Isner | No Series Event Held This Week |
| 3 | August 2 – August 8 | Washington D.C. Citi Open 2021 Champion: Jannik Sinner | San Jose Mubadala Silicon Valley Classic 2021 Champion: Danielle Collins |
| 4 | August 6 – August 15 | Toronto National Bank Open presented by Rogers 2021 Champion: Daniil Medvedev | Montreal National Bank Open presented by Rogers 2021 Champion: Camila Giorgi |
| 5 | August 15 – August 22 | Cincinnati Western & Southern Open 2021 Champion: Alexander Zverev | Cincinnati Western & Southern Open 2021 Champion: Ashleigh Barty |
| 6 | August 21 – August 28 | Winston-Salem Winston-Salem Open 2021 Champion: Ilya Ivashka | Cleveland Tennis in the Land 2021 Champion: Anett Kontaveit |
| 7–8 | August 30 – September 12 | New York US Open 2021 Champion: Daniil Medvedev | New York US Open 2021 Champion: Emma Raducanu |

## Week 1
### Hall of Fame Open

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Alexander Bublik | 6 | 6$^3$ | 5 | | | | |
| 8/WC | Kevin Anderson | 4 | 7$^7$ | 7 | | | | |
| 8/WC | Kevin Anderson | 4 | 7$^7$ | 7 | 8/WC | Kevin Anderson | 7$^{10}$ | 6 |
| | | | | | | Jenson Brooksby | 6$^8$ | 4 |
| | Jenson Brooksby | 6 | 7$^7$ | | | Jenson Brooksby | 6$^8$ | 4 |
| 7 | Jordan Thompson | 3 | 6$^3$ | | | | | |

## Week 2
### Truist Atlanta Open

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| SE | Brandon Nakashima | 3 | 6 | 6 | | | | |
| | Emil Ruusuvuori | 6 | 4 | 3 | | | | |
| | Emil Ruusuvuori | 6 | 4 | 3 | SE | Brandon Nakashima | 6$^8$ | 5 |
| | | | | | 6 | John Isner | 7$^{10}$ | 7 |
| 5 | Taylor Fritz | 6$^4$ | 7 | 3 | 6 | John Isner | 7$^{10}$ | 7 |
| 6 | John Isner | 7$^7$ | 5 | 6 | | | | |

## Week 3
### Citi Open

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 14 | Lloyd Harris | 3 | 5 | | | | | | | | | | |
| | Kei Nishikori | 6 | 7 | | | | | | | | | | |
| | Kei Nishikori | 6 | 7 | | Kei Nishikori | 4 | 6 | 5 | | | | | |
| | | | | | Mackenzie McDonald | 6 | 3 | 7 | | | | | |
| | Mackenzie McDonald | 6 | 6 | | Mackenzie McDonald | 6 | 3 | 7 | | | | | |
| | Denis Kudla | 3 | 2 | | | | | | | | | | |
| | Denis Kudla | 3 | 2 | | | | | | | Mackenzie McDonald | 5 | 6 | 5 |
| | | | | | | | | | 5 | Jannik Sinner | 7 | 4 | 7 |
| 5 | Jannik Sinner | 6 | 6 | | | | | | | | | | | 5 | Jannik Sinner | 7 | 4 | 7 |
| | Steve Johnson | 4 | 2 | | | | | | | | | | |
| | Steve Johnson | 4 | 2 | 5 | Jannik Sinner | 7$^7$ | 6 | | | | | | |
| | | | | WC | Jenson Brooksby | 6$^2$ | 1 | | | | | | |
| 11 | John Millman | 1 | 2 | WC | Jenson Brooksby | 6$^2$ | 1 | | | | | | |
| WC | Jenson Brooksby | 6 | 6 | | | | | | | | | | |

### Mubadala Silicon Valley Classic

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Elise Mertens | 3 | 2 | | | | | |
| 4 | Daria Kasatkina | 6 | 6 | | | | | |
| 4 | Daria Kasatkina | 6 | 6 | 4 | Daria Kasatkina | 3 | 7$^{12}$ | 1 |
| | | | | 7 | Danielle Collins | 6 | 6$^{10}$ | 6 |
| Q | Ana Konjuh | 0 | 2 | 7 | Danielle Collins | 6 | 6$^{10}$ | 6 |
| 7 | Danielle Collins | 6 | 6 | | | | | |

## Week 4
### National Bank Open presented by Rogers

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Daniil Medvedev | 2 | 7$^8$ | 7$^7$ | | | | | | | | | |
| 7 | Hubert Hurkacz | 6 | 6$^6$ | 6$^5$ | | | | | | | | | |
| 7 | Hubert Hurkacz | 6 | 6$^6$ | 6$^5$ | 1 | Daniil Medvedev | 6 | 6 | | | | | |
| | | | | | | John Isner | 2 | 2 | | | | | |
| | John Isner | 7$^7$ | 6 | | | John Isner | 2 | 2 | | | | | |
| 11 | Gaël Monfils | 6$^5$ | 4 | | | | | | | | | | |
| 11 | Gaël Monfils | 6$^5$ | 4 | | | | | | | 1 | Daniil Medvedev | 6 | 6 |
| | | | | | | | | | | | Reilly Opelka | 4 | 3 |
| 6 | Casper Ruud | 1 | 4 | | | | | | | | | | | Reilly Opelka | 4 | 3 |
| 3 | Stefanos Tsitsipas | 6 | 6 | | | | | | | | | | |
| 3 | Stefanos Tsitsipas | 6 | 6 | | 3 | Stefanos Tsitsipas | 7$^7$ | 6$^4$ | 4 | | | | |
| | | | | | | Reilly Opelka | 6$^2$ | 7$^7$ | 6 | | | | |
| 10 | Roberto Bautista Agut | 3 | 6$^1$ | | | Reilly Opelka | 6$^2$ | 7$^7$ | 6 | | | | |
| | Reilly Opelka | 6 | 7$^7$ | | | | | | | | | | |
| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Aryna Sabalenka | 6 | 6 | | | | | | | | | | |
| 8 | Victoria Azarenka | 2 | 4 | | | | | | | | | | |
| 8 | Victoria Azarenka | 2 | 4 | | 1 | Aryna Sabalenka | 3 | 4 | | | | | |
| | | | | | 4 | Karolína Plíšková | 6 | 6 | | | | | |
| 4 | Karolína Plíšková | 6 | 6 | | 4 | Karolína Plíšková | 6 | 6 | | | | | |
| | Sara Sorribes Tormo | 4 | 0 | | | | | | | | | | |
| | Sara Sorribes Tormo | 4 | 0 | | | | | | | 4 | Karolína Plíšková | 3 | 5 |
| | | | | | | | | | | | Camila Giorgi | 6 | 7 |
| | Camila Giorgi | 6 | 7$^7$ | | | | | | | | | | | Camila Giorgi | 6 | 7 |
| 15 | Coco Gauff | 4 | 6$^2$ | | | | | | | | | | |
| 15 | Coco Gauff | 4 | 6$^2$ | | | Camila Giorgi | 6 | 3 | 6 | | | | |
| | | | | | | Jessica Pegula | 3 | 6 | 1 | | | | |
| | Jessica Pegula | 1 | 7$^7$ | 6 | | Jessica Pegula | 3 | 6 | 1 | | | | |
| 13 | Ons Jabeur | 6 | 6$^4$ | 0 | | | | | | | | | |

## Week 5
### Western & Southern Open

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Daniil Medvedev | 6 | 6 | | | | | | | | | | |
| 7 | Pablo Carreño Busta | 1 | 1 | | | | | | | | | | |
| 7 | Pablo Carreño Busta | 1 | 1 | | 1 | Daniil Medvedev | 6 | 3 | 3 | | | | |
| | | | | | 4 | Andrey Rublev | 2 | 6 | 6 | | | | |
| 4 | Andrey Rublev | 6 | 3 | 6 | 4 | Andrey Rublev | 2 | 6 | 6 | | | | |
| | Benoît Paire | 2 | 6 | 3 | | | | | | | | | |
| | Benoît Paire | 2 | 6 | 3 | | | | | | 4 | Andrey Rublev | 2 | 3 |
| | | | | | | | | | | 3 | Alexander Zverev | 6 | 6 |
| 8 | Casper Ruud | 1 | 3 | | | | | | | | | | | 3 | Alexander Zverev | 6 | 6 |
| 3 | Alexander Zverev | 6 | 6 | | | | | | | | | | |
| 3 | Alexander Zverev | 6 | 6 | | 3 | Alexander Zverev | 6 | 3 | 7$^7$ | | | | |
| | | | | | 2 | Stefanos Tsitsipas | 4 | 6 | 6$^4$ | | | | |
| 12 | Félix Auger-Aliassime | 2 | 7 | 1 | 2 | Stefanos Tsitsipas | 4 | 6 | 6$^4$ | | | | |
| 2 | Stefanos Tsitsipas | 6 | 5 | 6 | | | | | | | | | |
| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Ashleigh Barty | 6 | 6 | | | | | | | | |
| 9 | Barbora Krejčíková | 2 | 4 | | | | | | | | |
| 9 | Barbora Krejčíková | 2 | 4 | 1 | Ashleigh Barty | 6 | 7 | | | | |
| | | | | | Angelique Kerber | 2 | 5 | | | | |
| | Angelique Kerber | 6 | 3 | | Angelique Kerber | 2 | 5 | | | | |
| 11 | Petra Kvitová | 4 | 3$^r$ | | | | | | | | |
| 11 | Petra Kvitová | 4 | 3$^r$ | | | | | 1 | Ashleigh Barty | 6 | 6 |
| | | | | | | | | WC | Jil Teichmann | 3 | 1 |
| 5 | Karolína Plíšková | 7 | 2 | | | | | | | | | WC | Jil Teichmann | 3 | 1 |
| | Paula Badosa | 5 | 0$^r$ | | | | | | | | |
| | Paula Badosa | 5 | 0$^r$ | 5 | Karolína Plíšková | 2 | 4 | | | | |
| | | | | WC | Jil Teichmann | 6 | 6 | | | | |
| 10 | Belinda Bencic | 3 | 2 | WC | Jil Teichmann | 6 | 6 | | | | |
| WC | Jil Teichmann | 6 | 6 | | | | | | | | |

## Week 6
### Winston-Salem Open

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final |
| 1/WC | Pablo Carreño Busta | 6$^2$ | 3 | | | | | | | | |
| | Ilya Ivashka | 7$^7$ | 6 | | | | | | | | |
| | Ilya Ivashka | 7$^7$ | 6 | | | Ilya Ivashka | 6 | 6 | | | |
| | | | | | | Emil Ruusuvuori | 2 | 1 | | | |
| 14 | Richard Gasquet | 6$^5$ | 1 | | | Emil Ruusuvuori | 2 | 1 | | | |
| | Emil Ruusuvuori | 7$^7$ | 6 | | | | | | | | |
| | Emil Ruusuvuori | 7$^7$ | 6 | | | | | | Ilya Ivashka | 6 | 6 |
| | | | | | | | | | Mikael Ymer | 0 | 2 |
| | Marcos Giron | 6$^2$ | 2 | | | | | | | | | Mikael Ymer | 0 | 2 |
| 15 | Carlos Alcaraz | 7$^7$ | 6 | | | | | | | | |
| 15 | Carlos Alcaraz | 7$^7$ | 6 | | 15 | Carlos Alcaraz | 5 | 3 | | | |
| | | | | | | Mikael Ymer | 7 | 6 | | | |
| | Mikael Ymer | 6$^2$ | 6 | 6 | | Mikael Ymer | 7 | 6 | | | |
| 13 | Frances Tiafoe | 7$^7$ | 2 | 3 | | | | | | | |

### Tennis in the Land

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 6 | Magda Linette | 6$^5$ | 2 | | | | |
| | Irina-Camelia Begu | 7$^7$ | 6 | | | | |
| | Irina-Camelia Begu | 7$^7$ | 6 | | Irina-Camelia Begu | 6$^5$ | 4 |
| | | | | 2 | Anett Kontaveit | 7$^7$ | 6 |
| 7 | Sara Sorribes Tormo | 4 | 4 | 2 | Anett Kontaveit | 7$^7$ | 6 |
| 2 | Anett Kontaveit | 6 | 6 | | | | |

## Weeks 7 & 8
### US Open

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Novak Djokovic | 5 | 6 | 6 | 6 | | | | | | | | | | | | |
| 6 | Matteo Berrettini | 7 | 2 | 2 | 3 | | | | | | | | | | | | |
| 6 | Matteo Berrettini | 7 | 2 | 2 | 3 | 1 | Novak Djokovic | 4 | 6 | 6 | 4 | 6 | | | | | |
| | | | | | | 4 | Alexander Zverev | 6 | 2 | 4 | 6 | 2 | | | | | |
| 4 | Alexander Zverev | 7$^8$ | 6 | 6 | | 4 | Alexander Zverev | 6 | 2 | 4 | 6 | 2 | | | | | |
| | Lloyd Harris | 6$^6$ | 3 | 4 | | | | | | | | | | | | | |
| | Lloyd Harris | 6$^6$ | 3 | 4 | | | | | | | | | 1 | Novak Djokovic | 4 | 4 | 4 |
| | | | | | | | | | | | | | 2 | Daniil Medvedev | 6 | 6 | 6 |
| 12 | Félix Auger-Aliassime | 6 | 3 | | | | | | | | | | | | | | | 2 | Daniil Medvedev | 6 | 6 | 6 |
| | Carlos Alcaraz | 3 | 1$^r$ | | | | | | | | | | | | | | |
| | Carlos Alcaraz | 3 | 1$^r$ | | | 12 | Félix Auger-Aliassime | 4 | 5 | 2 | | | | | | | |
| | | | | | | 2 | Daniil Medvedev | 6 | 7 | 6 | | | | | | | |
| Q | Botic van de Zandschulp | 3 | 0 | 6 | 5 | 2 | Daniil Medvedev | 6 | 7 | 6 | | | | | | | |
| 2 | Daniil Medvedev | 6 | 6 | 4 | 7 | | | | | | | | | | | | |
| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| Q | Emma Raducanu | 6 | 6 | | | | | | | | | | |
| 11 | Belinda Bencic | 3 | 4 | | | | | | | | | | |
| 11 | Belinda Bencic | 3 | 4 | | Q | Emma Raducanu | 6 | 6 | | | | | |
| | | | | | 17 | Maria Sakkari | 1 | 4 | | | | | |
| 4 | Karolína Plíšková | 4 | 4 | | 17 | Maria Sakkari | 1 | 4 | | | | | |
| 17 | Maria Sakkari | 6 | 6 | | | | | | | | | | |
| 17 | Maria Sakkari | 6 | 6 | | | | | | | Q | Emma Raducanu | 6 | 6 |
| | | | | | | | | | | | Leylah Fernandez | 4 | 3 |
| 5 | Elina Svitolina | 3 | 6 | 6$^5$ | | | | | | | | | | Leylah Fernandez | 4 | 3 |
| | Leylah Fernandez | 6 | 3 | 7$^7$ | | | | | | | | | |
| | Leylah Fernandez | 6 | 3 | 7$^7$ | | Leylah Fernandez | 7$^7$ | 4 | 6 | | | | |
| | | | | | 2 | Aryna Sabalenka | 6$^3$ | 6 | 4 | | | | |
| 8 | Barbora Krejčíková | 1 | 4 | | 2 | Aryna Sabalenka | 6$^3$ | 6 | 4 | | | | |
| 2 | Aryna Sabalenka | 6 | 6 | | | | | | | | | | |