| Houston – Men's singles | |
|---|---|
| 2019 Oracle Challenger Series – Houston | |
| Champion |  Marcos Giron |
| Runner-up |  Ivo Karlović |
| Score | 7–5, 6–7(5–7), 7–6(11–9) |
Bradley Klahn was the defending champion [1] but lost in the third round to Michael Mmoh.
Marcos Giron won the title after defeating Ivo Karlović 7–5, 6–7(5–7), 7–6(11–9) in the final.
All seeds receive a bye into the second round.
Tennys Sandgren (third round) Bradley Klahn (third round) Ivo Karlović (final) Marcos Giron (champion)
Jason Jung (quarterfinals)
Christopher O'Connell (semifinals)
Darian King (second round) Mitchell Krueger (semifinals)
Alexey Vatutin (third round) Donald Young (second round)
Adrián Menéndez Maceiras (third round)
Peđa Krstin (third round) Jenson Brooksby (third round) Michael Mmoh (quarterfinals, retired) Michael Redlicki (quarterfinals) Sekou Bangoura (third round)| Quarterfinals | Semifinals | Final | ||||||||||||||||||
| 15 | Michael Redlicki | 4 | 4 | |||||||||||||||||
| 8 | Mitchell Krueger | 6 | 6 | |||||||||||||||||
| 8 | Mitchell Krueger | 64 | 2 | |||||||||||||||||
| 4 | Marcos Giron | 77 | 6 | |||||||||||||||||
| 4 | Marcos Giron | 6 | 2 | 6 | ||||||||||||||||
| 5 | Jason Jung | 1 | 6 | 2 | ||||||||||||||||
| 4 | Marcos Giron | 7 | 65 | 711 | ||||||||||||||||
| 3 | Ivo Karlović | 5 | 77 | 69 | ||||||||||||||||
| Q |  Alexis Galarneau | 63 | 67 | |||||||||||||||||
| 3 | Ivo Karlović | 77 | 79 | |||||||||||||||||
| 3 | Ivo Karlović | 65 | 6 | 6 | ||||||||||||||||
| 6 | Christopher O'Connell | 77 | 3 | 4 | ||||||||||||||||
| 6 | Christopher O'Connell | 5 | ||||||||||||||||||
| 14 | Michael Mmoh | 0r | ||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 1 | T Sandgren | 6 | 7 | ||||||||||||||||||||||||
 E Leshem | 6 | 6 | E Leshem | 3 | 5 | ||||||||||||||||||||||
 Christopher Heyman | 4 | 4 | 1 | T Sandgren | 77 | 4 | 4 | ||||||||||||||||||||
| G Nanda | 6 | 6 | 15 | Mi Redlicki | 65 | 6 | 6 | ||||||||||||||||||||
| WC | O Crawford | 4 | 3 | G Nanda | 3 | 3 | |||||||||||||||||||||
| 15 | Mi Redlicki | 6 | 6 | ||||||||||||||||||||||||
| 15 | Mi Redlicki | 4 | 4 | ||||||||||||||||||||||||
| 8 | M Krueger | 6 | 6 | ||||||||||||||||||||||||
| 12 | P Krstin | 6 | 1 | 6 | |||||||||||||||||||||||
| N Chappell | 6 | 3 | 77 | N Chappell | 1 | 6 | 1 | ||||||||||||||||||||
 S Fanselow | 1 | 6 | 65 | 12 | P Krstin | 64 | 4 | ||||||||||||||||||||
| WC | Z Khan | 4 | 3 | 8 | M Krueger | 77 | 6 | ||||||||||||||||||||
 F Meligeni Alves | 6 | 6 | F Meligeni Alves | 2 | 2 | ||||||||||||||||||||||
| 8 | M Krueger | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 4 | M Giron | 77 | 67 | 6 | |||||||||||||||||||||||
| WC | B Holt | 6 | 7 | WC | B Holt | 64 | 79 | 2 | |||||||||||||||||||
 C Sinclair | 1 | 5 | 4 | M Giron | 6 | 4 | 6 | ||||||||||||||||||||
| R Matos | 63 | 4 | 13 | J Brooksby | 2 | 6 | 3 | ||||||||||||||||||||
 G Villanueva | 77 | 6 | G Villanueva | 2 | 2 | ||||||||||||||||||||||
| 13 | J Brooksby | 6 | 6 | ||||||||||||||||||||||||
| 4 | M Giron | 6 | 2 | 6 | |||||||||||||||||||||||
| 5 | J Jung | 1 | 6 | 2 | |||||||||||||||||||||||
| 9 | A Vatutin | 1 | 7 | 6 | |||||||||||||||||||||||
| A Sarkissian | 1 | 1 |  D Hidalgo | 6 | 5 | 3 | |||||||||||||||||||||
| D Hidalgo | 6 | 6 | 9 | A Vatutin | 5 | 2 | |||||||||||||||||||||
| WC | Sumit Sarkar | 1 | 0 | 5 | J Jung | 7 | 6 | ||||||||||||||||||||
| D Nguyen | 6 | 6 | D Nguyen | 3 | 2 | ||||||||||||||||||||||
| 5 | J Jung | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 7 | D King | 63 | 5 | ||||||||||||||||||||||||
| G Escobar | 6 | 77 | G Escobar | 77 | 7 | ||||||||||||||||||||||
| E Zhu | 2 | 64 | G Escobar | 3 | 3 | ||||||||||||||||||||||
| Q | A Galarneau | 6 | 6 | Q | A Galarneau | 6 | 6 | ||||||||||||||||||||
 G López Villaseñor | 3 | 3 | Q | A Galarneau | 3 | 6 | 6 | ||||||||||||||||||||
| 10 | D Young | 6 | 3 | 0 | |||||||||||||||||||||||
| Q | A Galarneau | 63 | 67 | ||||||||||||||||||||||||
| 3 | I Karlović | 77 | 79 | ||||||||||||||||||||||||
| 16 | S Bangoura | 0 | 6 | 6 | |||||||||||||||||||||||
| A Ritschard | 3 | 5 | P Heller | 6 | 4 | 2 | |||||||||||||||||||||
| Peter Heller | 6 | 7 | 16 | S Bangoura | 65 | 6 | 4 | ||||||||||||||||||||
 L Caruana | 6 | 6 | 3 | I Karlović | 77 | 2 | 6 | ||||||||||||||||||||
| WC |  Mohamed Abdel-Aziz | 2 | 4 | L Caruana | 5 | 4 | |||||||||||||||||||||
| 3 | I Karlović | 7 | 6 | ||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 6 | C O'Connell | 6 | 5 | 6 | |||||||||||||||||||||||
| MF Descotte | 4 | 3 | A Vavassori | 3 | 7 | 4 | |||||||||||||||||||||
| A Vavassori | 6 | 6 | 6 | C O'Connell | 77 | 6 | |||||||||||||||||||||
| Gage Brymer | 2 | 65 | 11 | A Menéndez Maceiras | 63 | 4 | |||||||||||||||||||||
| C Altamirano | 6 | 77 | C Altamirano | 4 | 0 | ||||||||||||||||||||||
| 11 | A Menéndez Maceiras | 6 | 6 | ||||||||||||||||||||||||
| 6 | C O'Connell | 5 | |||||||||||||||||||||||||
| 14 | M Mmoh | 0r | |||||||||||||||||||||||||
| 14 | M Mmoh | 4 | 6 | 6 | |||||||||||||||||||||||
| E King | 6 | 4 | 5 | R Sarmiento | 6 | 4 | 4 | ||||||||||||||||||||
| R Sarmiento | 4 | 6 | 7 | 14 | M Mmoh | 5 | 77 | 77 | |||||||||||||||||||
 FC Jianu | 6 | 6 | 2 | B Klahn | 7 | 65 | 65 | ||||||||||||||||||||
| Q | Alafia Ayeni | 4 | 2 | FC Jianu | 5 | 3 | |||||||||||||||||||||
| 2 | B Klahn | 7 | 6 | ||||||||||||||||||||||||
Juan Mónaco was the defending champion, but lost to John Isner in the semifinals.
Isner went on to win the title, defeating Nicolás Almagro in the final, 6–3, 7–5.
Rajeev Ram was the defending champion, but lost in the second round to Dudi Sela.
Stan Wawrinka defeated the defending champion Novak Djokovic in the final, 6–7(1–7), 6–4, 7–5, 6–3 to win the men's singles tennis title at the 2016 US Open. It was his third major title; on all three occasions, he defeated the world No. 1 player in the final. Wawrinka saved a match point en route to the title, against Dan Evans in the third round. Djokovic became the third man in the Open Era to lose five finals at the same major.
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.
Novak Djokovic defeated Roger Federer in the final, 6–4, 6–4 to win the men's singles tennis title at the 2018 Cincinnati Masters. With this win, he became the first player to complete the career Golden Masters in singles.
Tim Smyczek was the defending champion but lost in the second round to Thai-Son Kwiatkowski.
This was the first edition of the tournament.
David Ferrer was the defending champion but chose not to defend his title.
Tommy Paul won the title after defeating Tennys Sandgren 6–3, 6–4 in the final.
Marin Čilić was the defending champion, but lost in the second round to Diego Schwartzman.
Evgeny Karlovskiy was the defending champion but lost in the first round to Stefan Kozlov.
Bradley Klahn was the defending champion but chose not to defend his title.
Defending champion Rafael Nadal defeated Daniil Medvedev in the final, 6–3, 6–0 to win the men's singles tennis title at the 2019 Canadian Open. It was the first time Nadal successfully defended a hard court title.
This was the first edition of the tournament.
James Duckworth was the defending champion but chose not to defend his title.
Michael Mmoh was the defending champion but lost in the second round to Brandon Nakashima.
Tommy Paul was the defending champion but chose not to defend his title.
Reilly Opelka was the defending champion but chose not to defend his title.
Taylor Fritz was the defending champion but lost in the third round to Mitchell Krueger.
Emilio Gómez was the defending champion but chose not to defend his title.