# 2019 Tiburon Challenger – Singles

Michael Mmoh was the defending champion 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.

## Seeds

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)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Tommy Paul | 6 | 1 | 7$^7$ | | | | | | | | | | |
| | Gonzalo Escobar | 4 | 6 | 6$^2$ | | | | | | | | | | |
| | Gonzalo Escobar | 4 | 6 | 6$^2$ | 1 | Tommy Paul | 6 | 7$^7$ | | | | | | |
| | | | | | 4 | Emilio Gómez | 1 | 6$^5$ | | | | | | |
| 4 | Emilio Gómez | 6 | 1 | 6 | 4 | Emilio Gómez | 1 | 6$^5$ | | | | | | |
| | Sekou Bangoura | 3 | 6 | 2 | | | | | | | | | | |
| | Sekou Bangoura | 3 | 6 | 2 | | | | | | 1 | Tommy Paul | 7 | 6$^3$ | 6 |
| | | | | | | | | | | 8 | Thanasi Kokkinakis | 5 | 7$^7$ | 4 |
| WC | Brandon Nakashima | 5 | 6 | 6$^6$ | | | | | | | | | | | 8 | Thanasi Kokkinakis | 5 | 7$^7$ | 4 |
| 14 | Thai-Son Kwiatkowski | 7 | 1 | 7$^8$ | | | | | | | | | | |
| 14 | Thai-Son Kwiatkowski | 7 | 1 | 7$^8$ | 14 | Thai-Son Kwiatkowski | 6 | 2 | 1 | | | | | |
| | | | | | 8 | Thanasi Kokkinakis | 2 | 6 | 6 | | | | | |
| 8 | Thanasi Kokkinakis | 6 | 6 | | 8 | Thanasi Kokkinakis | 2 | 6 | 6 | | | | | |
| 16 | Maxime Cressy | 4 | 2 | | | | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1 | T Paul | 5 | 6 | 6 | | | | | | | | | |
| WC | B Holt | 6 | 6$^6$ | 6 | WC | B Holt | 7 | 3 | 2 | | | | | | | | | |
| PR | R Sarmiento | 4 | 7$^8$ | 3 | | | | | | 1 | T Paul | 7$^{10}$ | 6 | | | | | |
| | H Gaston | 3 | 6 | 6 | | | | | | | H Gaston | 6$^8$ | 1 | | | | | |
| | Evan Song | 6 | 4 | 4 | | H Gaston | 3 | 6 | 6 | | | | | | | | | |
| | | | | | 13 | DE Galán | 6 | 3 | 4 | | | | | | | | | |
| | | | | | | | | | | | | | | 1 | T Paul | 6 | 1 | 7$^7$ |
| | | | | | | | | | | | | | | | G Escobar | 4 | 6 | 6$^2$ |
| | | | | | 11 | M Krueger | 6$^7$ | 3 | | | | | | | | | | |
| | Roy Smith | 2 | 6 | 2 | | G Escobar | 7$^9$ | 6 | | | | | | | | | | |
| | G Escobar | 6 | 3 | 6 | | | | | | | G Escobar | 6 | 7$^{11}$ | | | | | |
| | A Ritschard | 0 | 4 | | | | | | | 5 | M Torpegaard | 4 | 6$^9$ | | | | | |
| | R Peniston | 6 | 6 | | | R Peniston | 6 | 4 | 3 | | | | | | | | | |
| | | | | | 5 | M Torpegaard | 4 | 6 | 6 | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 4 | E Gómez | 5 | 6 | 6 | | | | | | | | | | |
| | M Pervolarakis | 6 | 7$^7$ | | M Pervolarakis | 7 | 0 | 4 | | | | | | | | | | |
| | C Sinclair | 3 | 6$^0$ | | | | | | 4 | E Gómez | 7$^7$ | 2 | 6 | | | | | |
| | D Young | 6 | 6 | | | | | | 15 | E Escobedo | 6$^4$ | 6 | 2 | | | | | |
| | R Shane | 1 | 1 | | D Young | 1 | 2$^r$ | | | | | | | | | | | |
| | | | | 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 | 6$^2$ | 5 | | | | | | | | | | |
| | | | | 7 | D King | 2 | 7$^7$ | 7 | | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | 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 | 7$^7$ | 7 | | | | | | |
| Q | E Zhu | 3 | 4 | | | | | | | 10 | C Eubanks | 6$^5$ | 5 | | | | | | |
| | M Arévalo | 6 | 6 | | | M Arévalo | 4 | 4 | | | | | | | | | | | |
| | | | | | 10 | C Eubanks | 6 | 6 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | WC | B Nakashima | 5 | 6 | 6$^6$ |
| | | | | | | | | | | | | | | | 14 | T-S Kwiatkowski | 7 | 1 | 7$^8$ |
| | | | | | 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 | 7$^7$ | 6 | | | | | |
| | F Peliwo | 3 | 7 | 3 | | | | | | 3 | M Giron | 6 | 6$^3$ | 4 | | | | | |
| | Mi Redlicki | 6 | 5 | 6 | | Mi Redlicki | 4 | 5 | | | | | | | | | | | |
| | | | | | 3 | M Giron | 6 | 7 | | | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 8 | T Kokkinakis | 6 | 6 | | | | | | | | | |
| | E Leshem | 6$^3$ | 6 | 6 | | E Leshem | 4 | 0 | | | | | | | | | |
| WC | O Crawford | 7$^7$ | 4 | 4 | | | | | 8 | T Kokkinakis | 7 | 6 | | | | | |
| | JC Aragone | 6 | 7$^7$ | | | | | | 9 | E Couacaud | 5 | 1 | | | | | |
| | C Altamirano | 2 | 6$^3$ | | | 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 | 7$^7$ | 6$^3$ | 4 | | J. J. Wolf | 1 | 4 | | | | | | | | | |
| | J. J. Wolf | 6$^3$ | 7$^7$ | 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 | | | | | | | | | |