| Singles | |
|---|---|
| 2019 Tiburon Challenger | |
| Champion |  Tommy Paul |
| Runner-up |  Thanasi Kokkinakis |
| Score | 7–5, 6–7(3–7), 6–4 |
Michael Mmoh was the defending champion [1] but lost in the second round to Brandon Nakashima.
Tommy Paul won the title after defeating Thanasi Kokkinakis 7–5, 6–7(3–7), 6–4 in the final.
All seeds receive a bye into the second round.
Tommy Paul (champion) Denis Kudla (second round) Marcos Giron (third round)
Emilio Gómez (semifinals)
Mikael Torpegaard (third round) Michael Mmoh (second round)
Darian King (third round) Thanasi Kokkinakis (final)
Enzo Couacaud (third round) Christopher Eubanks (third round) Mitchell Krueger (second round)
Peter Polansky (second round)
Daniel Elahi Galán (second round) Thai-Son Kwiatkowski (semifinals) Ernesto Escobedo (third round) Maxime Cressy (quarterfinals)| Quarterfinals | Semifinals | Final | ||||||||||||||||||
| 1 | Tommy Paul | 6 | 1 | 77 | ||||||||||||||||
| Gonzalo Escobar | 4 | 6 | 62 | |||||||||||||||||
| 1 | Tommy Paul | 6 | 77 | |||||||||||||||||
| 4 | Emilio Gómez | 1 | 65 | |||||||||||||||||
| 4 | Emilio Gómez | 6 | 1 | 6 | ||||||||||||||||
| Sekou Bangoura | 3 | 6 | 2 | |||||||||||||||||
| 1 | Tommy Paul | 7 | 63 | 6 | ||||||||||||||||
| 8 | Thanasi Kokkinakis | 5 | 77 | 4 | ||||||||||||||||
| WC | Brandon Nakashima | 5 | 6 | 66 | ||||||||||||||||
| 14 | Thai-Son Kwiatkowski | 7 | 1 | 78 | ||||||||||||||||
| 14 | Thai-Son Kwiatkowski | 6 | 2 | 1 | ||||||||||||||||
| 8 | Thanasi Kokkinakis | 2 | 6 | 6 | ||||||||||||||||
| 8 | Thanasi Kokkinakis | 6 | 6 | |||||||||||||||||
| 16 | Maxime Cressy | 4 | 2 | |||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 1 | T Paul | 5 | 6 | 6 | |||||||||||||||||||||||
| WC | B Holt | 6 | 66 | 6 | WC | B Holt | 7 | 3 | 2 | ||||||||||||||||||
| PR | R Sarmiento | 4 | 78 | 3 | 1 | T Paul | 710 | 6 | |||||||||||||||||||
| H Gaston | 3 | 6 | 6 | H Gaston | 68 | 1 | |||||||||||||||||||||
| Evan Song | 6 | 4 | 4 | H Gaston | 3 | 6 | 6 | ||||||||||||||||||||
| 13 | DE Galán | 6 | 3 | 4 | |||||||||||||||||||||||
| 1 | T Paul | 6 | 1 | 77 | |||||||||||||||||||||||
| G Escobar | 4 | 6 | 62 | ||||||||||||||||||||||||
| 11 | M Krueger | 67 | 3 | ||||||||||||||||||||||||
| Roy Smith | 2 | 6 | 2 | G Escobar | 79 | 6 | |||||||||||||||||||||
| G Escobar | 6 | 3 | 6 | G Escobar | 6 | 711 | |||||||||||||||||||||
| A Ritschard | 0 | 4 | 5 | M Torpegaard | 4 | 69 | |||||||||||||||||||||
 R Peniston | 6 | 6 | R Peniston | 6 | 4 | 3 | |||||||||||||||||||||
| 5 | M Torpegaard | 4 | 6 | 6 | |||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 4 | E Gómez | 5 | 6 | 6 | |||||||||||||||||||||||
 M Pervolarakis | 6 | 77 | M Pervolarakis | 7 | 0 | 4 | |||||||||||||||||||||
 C Sinclair | 3 | 60 | 4 | E Gómez | 77 | 2 | 6 | ||||||||||||||||||||
| D Young | 6 | 6 | 15 | E Escobedo | 64 | 6 | 2 | ||||||||||||||||||||
| R Shane | 1 | 1 | D Young | 1 | 2r | ||||||||||||||||||||||
| 15 | E Escobedo | 6 | 4 | ||||||||||||||||||||||||
| 4 | E Gómez | 6 | 1 | 6 | |||||||||||||||||||||||
| S Bangoura | 3 | 6 | 2 | ||||||||||||||||||||||||
| 12 | P Polansky | 1 | 4 | ||||||||||||||||||||||||
| S Bangoura | 6 | 7 | S Bangoura | 6 | 6 | ||||||||||||||||||||||
| Q |  M Geerts | 4 | 5 | S Bangoura | 1 | 6 | 6 | ||||||||||||||||||||
| WC | E Nava | 2 | 3 | 7 | D King | 6 | 4 | 0 | |||||||||||||||||||
| U Blanch | 6 | 6 | U Blanch | 6 | 62 | 5 | |||||||||||||||||||||
| 7 | D King | 2 | 77 | 7 | |||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 6 | M Mmoh | 7 | 3 | 4 | |||||||||||||||||||||||
| Ma Redlicki | 3 | 3 | WC | B Nakashima | 5 | 6 | 6 | ||||||||||||||||||||
| WC | B Nakashima | 6 | 6 | WC | B Nakashima | 77 | 7 | ||||||||||||||||||||
| Q | E Zhu | 3 | 4 | 10 | C Eubanks | 65 | 5 | ||||||||||||||||||||
 M Arévalo | 6 | 6 | M Arévalo | 4 | 4 | ||||||||||||||||||||||
| 10 | C Eubanks | 6 | 6 | ||||||||||||||||||||||||
| WC | B Nakashima | 5 | 6 | 66 | |||||||||||||||||||||||
| 14 | T-S Kwiatkowski | 7 | 1 | 78 | |||||||||||||||||||||||
| 14 | T-S Kwiatkowski | 6 | 6 | ||||||||||||||||||||||||
| PR |  C Gómez-Herrera | 6 | 4 | 6 | PR | C Gómez-Herrera | 4 | 4 | |||||||||||||||||||
 S Fanselow | 4 | 6 | 2 | 14 | T-S Kwiatkowski | 4 | 77 | 6 | |||||||||||||||||||
| F Peliwo | 3 | 7 | 3 | 3 | M Giron | 6 | 63 | 4 | |||||||||||||||||||
| Mi Redlicki | 6 | 5 | 6 | Mi Redlicki | 4 | 5 | |||||||||||||||||||||
| 3 | M Giron | 6 | 7 | ||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 8 | T Kokkinakis | 6 | 6 | ||||||||||||||||||||||||
 E Leshem | 63 | 6 | 6 | E Leshem | 4 | 0 | |||||||||||||||||||||
| WC | O Crawford | 77 | 4 | 4 | 8 | T Kokkinakis | 7 | 6 | |||||||||||||||||||
| JC Aragone | 6 | 77 | 9 | E Couacaud | 5 | 1 | |||||||||||||||||||||
| C Altamirano | 2 | 63 | JC Aragone | 3 | 1 | ||||||||||||||||||||||
| 9 | E Couacaud | 6 | 6 | ||||||||||||||||||||||||
| 8 | T Kokkinakis | 6 | 6 | ||||||||||||||||||||||||
| 16 | M Cressy | 4 | 2 | ||||||||||||||||||||||||
| 16 | M Cressy | 6 | 6 | ||||||||||||||||||||||||
| A Sarkissian | 77 | 63 | 4 | J. J. Wolf | 1 | 4 | |||||||||||||||||||||
| J. J. Wolf | 63 | 77 | 6 | 16 | M Cressy | 5 | 6 | 6 | |||||||||||||||||||
| WC |  O Štyler | 6 | 4 | 4 | R Quiroz | 7 | 2 | 3 | |||||||||||||||||||
| R Quiroz | 3 | 6 | 6 | R Quiroz | 6 | 6 | |||||||||||||||||||||
| 2 | D Kudla | 3 | 2 | ||||||||||||||||||||||||
Thanasi Kokkinakis and Nick Kyrgios were the defending champions, but were no longer eligible to compete in junior tennis.
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