| Singles | |
|---|---|
| 2019 Hall of Fame Open | |
| Champion |  John Isner |
| Runner-up |  Alexander Bublik |
| Final score | 7–6(7–2), 6–3 |
| Draw | 28 (4 Q / 3 WC ) |
| Seeds | 8 |
Steve Johnson was the defending champion, but lost in the first round to Christopher Eubanks.
John Isner won a record fourth Newport title, defeating Alexander Bublik in the final, 7–6(7–2), 6–3.
The top four seeds receive a bye into the second round.
John Isner (champion)
Adrian Mannarino (second round)
Jordan Thompson (second round) Ugo Humbert (semifinals) Steve Johnson (first round)
Ivo Karlović (first round) Alexander Bublik (final) Bradley Klahn (first round)| Semifinals | Final | ||||||||||||
| 1/WC | John Isner | 64 | 77 | 6 | |||||||||
| 4 | Ugo Humbert | 77 | 65 | 3 | |||||||||
| 1/WC | John Isner | 77 | 6 | ||||||||||
| 7 | Alexander Bublik | 62 | 3 | ||||||||||
 Marcel Granollers | 65 | 6 | 4 | ||||||||||
| 7 | Alexander Bublik | 77 | 3 | 6 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1/WC | J Isner | 6 | 65 | 6 | |||||||||||||||||||||||
| WC |  A Gray | 3 | 4 |  K Majchrzak | 4 | 77 | 3 | ||||||||||||||||||||
| K Majchrzak | 6 | 6 | 1/WC | J Isner | 4 | 6 | 6 | ||||||||||||||||||||
| M Ebden | 6 | 2 | 6 | M Ebden | 6 | 3 | 4 | ||||||||||||||||||||
 B Schnur | 1 | 6 | 3 | M Ebden | 6 | 6 | |||||||||||||||||||||
| D Kudla | 6 | 77 | D Kudla | 2 | 2 | ||||||||||||||||||||||
| 8 | B Klahn | 4 | 65 | 1/WC | J Isner | 64 | 77 | 6 | |||||||||||||||||||
| 4 | U Humbert | 77 | 65 | 3 | |||||||||||||||||||||||
| 4 | U Humbert | 77 | 6 | ||||||||||||||||||||||||
| Q |  R Ramanathan | 5 | 78 | 6 | Q | R Ramanathan | 65 | 0 | |||||||||||||||||||
 S Stakhovsky | 7 | 66 | 2 | 4 | U Humbert | 7 | 3 | 6 | |||||||||||||||||||
| B Tomic | 2 | 65 |  I Ivashka | 5 | 6 | 2 | |||||||||||||||||||||
| I Ivashka | 6 | 77 | I Ivashka | 6 | 6 | ||||||||||||||||||||||
| WC | C Eubanks | 711 | 77 | WC | C Eubanks | 4 | 3 | ||||||||||||||||||||
| 5 | S Johnson | 69 | 65 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | I Karlović | 66 | 67 | ||||||||||||||||||||||||
 G Andreozzi | 78 | 79 | G Andreozzi | 4 | 4 | ||||||||||||||||||||||
 M Zverev | 6 | 77 | M Zverev | 6 | 6 | ||||||||||||||||||||||
| Q | T Smyczek | 3 | 64 | M Zverev | 3 | 0 | |||||||||||||||||||||
| M Granollers | 6 | 6 | M Granollers | 6 | 6 | ||||||||||||||||||||||
| P Gunneswaran | 2 | 2 | M Granollers | 6 | 78 | ||||||||||||||||||||||
| 3 | J Thompson | 2 | 66 | ||||||||||||||||||||||||
| M Granollers | 65 | 6 | 4 | ||||||||||||||||||||||||
| 7 | A Bublik | 6 | 2 | 77 | 7 | A Bublik | 77 | 3 | 6 | ||||||||||||||||||
| Q | A Bolt | 4 | 6 | 64 | 7 | A Bublik | 3 | 6 | 6 | ||||||||||||||||||
| Q |  V Troicki | 3 | 7 | 7 | Q | V Troicki | 6 | 3 | 3 | ||||||||||||||||||
 J Jung | 6 | 5 | 5 | 7 | A Bublik | 0 | 6 | 6 | |||||||||||||||||||
 D Istomin | 4 | 7 | 4 | T Sandgren | 6 | 3 | 0 | ||||||||||||||||||||
| T Sandgren | 6 | 5 | 6 | T Sandgren | 6 | 6 | |||||||||||||||||||||
| 2 | A Mannarino | 4 | 1 | ||||||||||||||||||||||||
Bjorn Fratangelo (qualifying competition) Alex Bolt (qualified) Ramkumar Ramanathan (qualified)
Tatsuma Ito (first round) Quentin Halys (first round) Viktor Troicki (qualified) Noah Rubin (qualifying competition) Mitchell Krueger (first round)| First round | Qualifying competition | ||||||||||||
| 1 | Bjorn Fratangelo | 6 | 6 | ||||||||||
| Thai-Son Kwiatkowski | 1 | 4 | |||||||||||
| 1 | Bjorn Fratangelo | 2 | 3 | ||||||||||
| 6 | Viktor Troicki | 6 | 6 | ||||||||||
| WC | Karl Poling | 1 | 4 | ||||||||||
| 6 | Viktor Troicki | 6 | 6 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 2 | Alex Bolt | 6 | 6 | ||||||||||
 Evgeny Karlovskiy | 2 | 2 | |||||||||||
| 2 | Alex Bolt | 6 | 6 | ||||||||||
| 7 | Noah Rubin | 3 | 4 | ||||||||||
| PR |  Amir Weintraub | 1 | 1 | ||||||||||
| 7 | Noah Rubin | 6 | 6 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 3 | Ramkumar Ramanathan | 77 | 6 | ||||||||||
| WC | Maxime Cressy | 65 | 3 | ||||||||||
| 3 | Ramkumar Ramanathan | 6 | 66 | 6 | |||||||||
| Yūichi Sugita | 4 | 78 | 3 | ||||||||||
| Yūichi Sugita | 7 | 6 | |||||||||||
| 5 | Quentin Halys | 5 | 4 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 4 | Tatsuma Ito | 2 | 6 | 3 | |||||||||
| John-Patrick Smith | 6 | 3 | 6 | ||||||||||
| John-Patrick Smith | 4 | 6 | 2 | ||||||||||
| Tim Smyczek | 6 | 3 | 6 | ||||||||||
| Tim Smyczek | 6 | 6 | |||||||||||
| 8 | Mitchell Krueger | 3 | 1 | ||||||||||
Marin Čilić was the defending champion, but withdrew due to injury.
Two-time defending champion Novak Djokovic successfully defended his title, defeating Milos Raonic in the final, 6–2, 6–0, to win the men's singles title at the 2016 Indian Wells Masters. It was his record-equaling fifth Indian Wells title.
Kei Nishikori was the defending champion, but chose not to participate this year.
Second-seeded Gaël Monfils won the title, defeating Ivo Karlović in the final: 5–7, 7–6(8–6), 6–4.
Stan Wawrinka was the defending champion and successfully defended his title, defeating Mischa Zverev in the final, 4–6, 6–3, 6–3.
Dominic Thiem was the defending champion, but chose not to participate this year.
This was the first edition of the tournament.
Gaël Monfils was the defending champion, but lost in the second round to Yuki Bhambri.
Pablo Carreño Busta was the defending champion, but lost in the second round to Julien Benneteau.
This was the first edition of the tournament.
Jack Sock was the defending champion, but lost in the second round to Reilly Opelka.
Sam Querrey was the defending champion, but lost in the first round to Matthew Ebden.
Juan Martín del Potro defeated the defending champion Roger Federer in the final, 6–4, 6–7(8–10), 7–6(7–2) to win the men's singles tennis title at the 2018 Indian Wells Masters. Del Potro saved three championship points en route to his first ATP Tour Masters 1000 title, having been a runner-up on three previous occasions.
Marin Čilić was the defending champion, but lost in the second round to Malek Jaziri.
John Isner was the defending champion, but withdrew before the tournament began.
Alexander Zverev was the defending champion and successfully defended his title, defeating Alex de Minaur in the final, 6–2, 6–4.
Kevin Anderson was the defending champion, but withdrew before the tournament began because of a right elbow injury.
Frances Tiafoe was the defending champion, but lost in the first round to Dan Evans.
Alexander Zverev was the two-time defending champion but chose not to defend his title.
Kevin Anderson defeated Jenson Brooksby in the final, 7–6(10–8), 6–4, to win the men's singles tennis title at the 2021 Hall of Fame Open. It was played on outdoor grass courts and was part of the 250 series of the 2021 ATP Tour. It took place at the International Tennis Hall of Fame in Newport, Rhode Island, United States from 12–18 July 2021.
Nick Kyrgios was the reigning champion from when the tournament was last held in 2019, but lost in the first round to Mackenzie McDonald.