# 2019 Las Vegas Challenger – Singles

Thanasi Kokkinakis was the defending champion but chose not to defend his title.
Vasek Pospisil won the title after defeating James Duckworth 7–5, 6–7$^{(11–13)}$, 6–3 in the final.

## Seeds

All seeds receive a bye into the second round.
* Steve Johnson (quarterfinals)
* Taro Daniel (quarterfinals)
* Marcos Giron (quarterfinals)
* Blaž Rola (second round)
* James Duckworth (final)
* Emilio Gómez (third round)
* Peter Polansky (second round)
* Darian King (second round)
* Nicola Kuhn (second round)
* Christopher O'Connell (semifinals)
* Mitchell Krueger (third round)
* Dmitry Popko (third round)
* Jack Sock (second round, retired)
* Alejandro Tabilo (second round, retired)
* Donald Young (second round)
* J. J. Wolf (second round)

## 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 | Final | Final | Final | Final | Final |
| 1/WC | Steve Johnson | 4 | 7$^8$ | 6$^6$ | | | | | | | | | |
| | Ernesto Escobedo | 6 | 6$^6$ | 7$^8$ | | | | | | | | | |
| | Ernesto Escobedo | 6 | 6$^6$ | 7$^8$ | | Ernesto Escobedo | 4 | 6$^5$ | | | | | |
| | | | | | 5 | James Duckworth | 6 | 7$^7$ | | | | | |
| WC | Stefan Kozlov | 2 | 3 | | 5 | James Duckworth | 6 | 7$^7$ | | | | | |
| 5 | James Duckworth | 6 | 6 | | | | | | | | | | |
| 5 | James Duckworth | 6 | 6 | | | | | | 5 | James Duckworth | 5 | 7$^{13}$ | 3 |
| | | | | | | | | | | Vasek Pospisil | 7 | 6$^{11}$ | 6 |
| 10 | Christopher O'Connell | 7$^9$ | 3 | 7$^8$ | | | | | | | | | | Vasek Pospisil | 7 | 6$^{11}$ | 6 |
| 3 | Marcos Giron | 6$^7$ | 6 | 6$^6$ | | | | | | | | | |
| 3 | Marcos Giron | 6$^7$ | 6 | 6$^6$ | 10 | Christopher O'Connell | 4 | 3 | | | | | |
| | | | | | | Vasek Pospisil | 6 | 6 | | | | | |
| | Vasek Pospisil | 6 | 6 | | | Vasek Pospisil | 6 | 6 | | | | | |
| 2 | Taro Daniel | 4 | 1 | | | | | | | | | | |

### 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 | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1/WC | S Johnson | w/o | | | | | | | | | | | | |
| | JC Aragone | 7$^7$ | 7 | | | JC Aragone | | | | | | | | | | | | | |
| | L Lokoli | 6$^5$ | 5 | | | | | | | 1/WC | S Johnson | 6 | 6 | | | | | | |
| | Mi Redlicki | 6 | 2 | 6 | | | | | | | Mi Redlicki | 4 | 4 | | | | | | |
| | F Peliwo | 2 | 6 | 2 | | Mi Redlicki | 6 | 7 | | | | | | | | | | | |
| | | | | | 16 | J. J. Wolf | 3 | 5 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | 1/WC | S Johnson | 4 | 7$^8$ | 6$^6$ |
| | | | | | | | | | | | | | | | | E Escobedo | 6 | 6$^6$ | 7$^8$ |
| | | | | | 9 | N Kuhn | 6$^8$ | 6 | 1 | | | | | | | | | | |
| Q | D Novikov | 3 | 4 | | | E Escobedo | 7$^{10}$ | 3 | 6 | | | | | | | | | | |
| | E Escobedo | 6 | 6 | | | | | | | | E Escobedo | 7 | 3 | 6 | | | | | |
| | L Glasspool | 7 | 7$^7$ | | | | | | | 6 | E Gómez | 5 | 6 | 3 | | | | | |
| | Ma Redlicki | 5 | 6$^4$ | | | L Glasspool | 2 | 7$^7$ | 3 | | | | | | | | | | |
| | | | | | 6 | E Gómez | 6 | 6$^2$ | 6 | | | | | | | | | | |

#### Section 2

| 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 |
| | | | | | 4 | B Rola | 4 | 3 | | | | | | | | | |
| WC | S Kozlov | 6 | 6 | | WC | S Kozlov | 6 | 6 | | | | | | | | | |
| WC | Evan Song | 4 | 3 | | | | | | WC | S Kozlov | 5 | 6 | 6 | | | | |
| | A Ritschard | 7 | 6 | | | | | | | A Ritschard | 7 | 4 | 1 | | | | |
| WC | A Cozbinov | 5 | 4 | | | A Ritschard | 6 | 5 | | | | | | | | | |
| | | | | | 14 | A Tabilo | 2 | 3$^r$ | | | | | | | | | |
| | | | | | | | | | | | | | | WC | S Kozlov | 2 | 3 |
| | | | | | | | | | | | | | | 5 | J Duckworth | 6 | 6 |
| | | | | | 12 | D Popko | 6 | 6 | | | | | | | | | |
| | A Çelikbilek | 4 | 2 | | | R Quiroz | 3 | 0 | | | | | | | | | |
| | R Quiroz | 6 | 6 | | | | | | 12 | D Popko | 3 | 4 | | | | | |
| | Roy Smith | 6 | 4 | 6 | | | | | 5 | J Duckworth | 6 | 6 | | | | | |
| | M Arévalo | 2 | 6 | 3 | | R Smith | 4 | 4 | | | | | | | | | |
| | | | | | 5 | J Duckworth | 6 | 6 | | | | | | | | | |

### 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 |
| | | | | | 8 | D King | 7$^7$ | 4 | 3 | | | | | | | | | | |
| | J Draper | 5 | 6$^3$ | | | R Peniston | 6$^5$ | 6 | 6 | | | | | | | | | | |
| | R Peniston | 7 | 7$^7$ | | | | | | | | R Peniston | 3 | 7 | 2 | | | | | |
| | N Mejía | 4 | 6 | 6 | | | | | | 10 | C O'Connell | 6 | 5 | 6 | | | | | |
| | T Bellucci | 6 | 1 | 3 | | N Mejía | 3 | 2 | | | | | | | | | | | |
| | | | | | 10 | C O'Connell | 6 | 6 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | 10 | C O'Connell | 7$^9$ | 3 | 7$^8$ |
| | | | | | | | | | | | | | | | 3 | M Giron | 6$^7$ | 6 | 6$^6$ |
| | | | | | 13 | J Sock | 6$^7$ | 0$^r$ | | | | | | | | | | | |
| Q | M Pervolarakis | 6 | 6 | | Q | M Pervolarakis | 7$^9$ | 1 | | | | | | | | | | | |
| WC | Alex Kobelt | 1 | 3 | | | | | | | Q | M Pervolarakis | 0 | 6$^4$ | | | | | | |
| | C Altamirano | 3 | 5 | | | | | | | 3 | M Giron | 6 | 7$^7$ | | | | | | |
| | K King | 6 | 7 | | | K King | 4 | 3 | | | | | | | | | | | |
| | | | | | 3 | M Giron | 6 | 6 | | | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 7 | P Polansky | 1 | 2 | | | | | | | | |
| V Pospisil | 6 | 6 | | | V Pospisil | 6 | 6 | | | | | | | | |
| M Mmoh | 3 | 2 | | | | | | | V Pospisil | 6 | 6 | | | | |
| L Broady | 6 | 2 | 7$^7$ | | | | | 11 | M Krueger | 4 | 1 | | | | |
| R Cid Subervi | 3 | 6 | 6$^3$ | | L Broady | 4 | 2 | | | | | | | | |
| | | | | 11 | M Krueger | 6 | 6 | | | | | | | | |
| | | | | | | | | | | | | | V Pospisil | 6 | 6 |
| | | | | | | | | | | | | 2 | T Daniel | 4 | 1 |
| | | | | 15 | D Young | 6$^9$ | 5 | | | | | | | | |
| G Escobar | 6$^1$ | 6 | 6 | | G Escobar | 7$^{11}$ | 7 | | | | | | | | |
| S Korda | 7$^7$ | 1 | 2 | | | | | | G Escobar | 3 | 3 | | | | |
| S Bangoura | 6$^5$ | 7$^7$ | 6 | | | | | 2 | T Daniel | 6 | 6 | | | | |
| E King | 7$^7$ | 6$^4$ | 4 | | S Bangoura | 4 | 6$^4$ | | | | | | | | |
| | | | | 2 | T Daniel | 6 | 7$^7$ | | | | | | | | |