# 2019 Nielsen Pro Tennis Championship – Singles

Evgeny Karlovskiy was the defending champion but lost in the first round to Stefan Kozlov.
Bradley Klahn won the title after defeating Jason Kubler 6–2, 7–5 in the final.

## Seeds

All seeds receive a bye into the second round.
* Bradley Klahn (champion)
* Matthew Ebden (second round, retired)
* Guido Andreozzi (third round, retired)
* Denis Istomin (semifinals)
* Jason Jung (quarterfinals)
* Bjorn Fratangelo (quarterfinals)
* Adrián Menéndez Maceiras (second round, retired)
* Ramkumar Ramanathan (quarterfinals)
* Michael Mmoh (second round)
* Quentin Halys (second round)
* Mitchell Krueger (second round)
* Jason Kubler (final)
* Thanasi Kokkinakis (semifinals, withdrew)
* Christopher Eubanks (quarterfinals)
* Donald Young (third round)
* Thai-Son Kwiatkowski (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 | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Bradley Klahn | 6 | 7$^7$ | | | | | | | | |
| 6/WC | Bjorn Fratangelo | 4 | 6$^3$ | | | | | | | | |
| 6/WC | Bjorn Fratangelo | 4 | 6$^3$ | 1 | Bradley Klahn | 6 | 6 | | | | |
| | | | | 4/WC | Denis Istomin | 2 | 3 | | | | |
| 4/WC | Denis Istomin | 6 | 7 | 4/WC | Denis Istomin | 2 | 3 | | | | |
| 8 | Ramkumar Ramanathan | 2 | 5 | | | | | | | | |
| 8 | Ramkumar Ramanathan | 2 | 5 | | | | | 1 | Bradley Klahn | 6 | 7 |
| | | | | | | | | 12 | Jason Kubler | 2 | 5 |
| 5 | Jason Jung | 6$^4$ | 1 | | | | | | | | | 12 | Jason Kubler | 2 | 5 |
| 13 | Thanasi Kokkinakis | 7$^7$ | 6 | | | | | | | | |
| 13 | Thanasi Kokkinakis | 7$^7$ | 6 | 13 | Thanasi Kokkinakis | | | | | | |
| | | | | 12 | Jason Kubler | w/o | | | | | |
| 12 | Jason Kubler | 6 | 6 | 12 | Jason Kubler | w/o | | | | | |
| 14 | Christopher Eubanks | 4 | 3 | | | | | | | | |

### 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 |
| | | | | | 1 | B Klahn | 7 | 6 | | | | | | | | | |
| WC | A Rybakov | 6$^3$ | 3 | | | M Purcell | 5 | 3 | | | | | | | | | |
| | M Purcell | 7$^7$ | 6 | | | | | | | 1 | B Klahn | 6 | 6 | | | | |
| ITF | S Bangoura | 7 | 6 | | | | | | | 15 | D Young | 1 | 3 | | | | |
| | R Shane | 5 | 3 | | ITF | S Bangoura | 3 | 4 | | | | | | | | | |
| | | | | | 15 | D Young | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | 1 | B Klahn | 6 | 7$^7$ |
| | | | | | | | | | | | | | | 6/WC | B Fratangelo | 4 | 6$^3$ |
| | | | | | 9 | M Mmoh | 4 | 4 | | | | | | | | | |
| | R Sarmiento | 7$^7$ | 4 | 0 | | R Smith | 6 | 6 | | | | | | | | | |
| | Roy Smith | 6$^3$ | 6 | 6 | | | | | | | R Smith | 3 | 3 | | | | |
| | U Blanch | 6 | 7$^7$ | | | | | | | 6/WC | B Fratangelo | 6 | 6 | | | | |
| WC | Stefan Dostanic | 2 | 6$^4$ | | | U Blanch | 6$^2$ | 6 | 0$^r$ | | | | | | | | |
| | | | | | 6/WC | B Fratangelo | 7$^7$ | 4 | 2 | | | | | | | | |

#### Section 2

| 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 |
| | | | | | 4/WC | D Istomin | 6 | 3 | 6 | | | | | | | | |
| | A Sarkissian | 2 | 2 | | ITF | A Dougaz | 3 | 6 | 3 | | | | | | | | |
| ITF | A Dougaz | 6 | 6 | | | | | | | 4/WC | D Istomin | 6 | 6 | | | | |
| | C Altamirano | 6 | 4 | 6 | | | | | | | C Altamirano | 3 | 0 | | | | |
| ITF | Ma Redlicki | 2 | 6 | 4 | | C Altamirano | 6 | 6 | | | | | | | | | |
| | | | | | 16 | T-S Kwiatkowski | 3 | 0 | | | | | | | | | |
| | | | | | | | | | | | | | | 4/WC | D Istomin | 6 | 7 |
| | | | | | | | | | | | | | | 8 | R Ramanathan | 2 | 5 |
| | | | | | 11 | M Krueger | 6 | 6$^2$ | 6$^3$ | | | | | | | | |
| | T Gabashvili | 3 | 0 | | | JC Aragone | 2 | 7$^7$ | 7$^7$ | | | | | | | | |
| | JC Aragone | 6 | 6 | | | | | | | | JC Aragone | 6$^6$ | 3 | | | | |
| | Mi Redlicki | 7 | 6 | | | | | | | 8 | R Ramanathan | 7$^8$ | 6 | | | | |
| | E King | 5 | 4 | | | Mi Redlicki | 5 | 5 | | | | | | | | | |
| | | | | | 8 | R Ramanathan | 7 | 7 | | | | | | | | | |

### Bottom half
#### Section 3

| 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 5 | J Jung | 6 | 6 | | | | | | | | |
| ITF | Jordi Arconada | 3 | 4 | | PR | M Neuchrist | 2 | 2 | | | | | | | | |
| PR | M Neuchrist | 6 | 6 | | | | | | 5 | J Jung | 6 | 6 | | | | |
| Q | Felix Corwin | 1 | 3 | | | | | | ITF | M Pervolarakis | 2 | 4 | | | | |
| ITF | M Pervolarakis | 6 | 6 | | ITF | M Pervolarakis | 7$^7$ | 7$^8$ | | | | | | | | |
| | | | | | 10 | Q Halys | 6$^3$ | 6$^6$ | | | | | | | | |
| | | | | | | | | | | | | | 5 | J Jung | 6$^4$ | 1 |
| | | | | | | | | | | | | | 13 | T Kokkinakis | 7$^7$ | 6 |
| | | | | | 13 | T Kokkinakis | 6 | 6 | | | | | | | | |
| | K King | 3 | 3 | | | A González | 4 | 3 | | | | | | | | |
| | A González | 6 | 6 | | | | | | 13 | T Kokkinakis | 7$^7$ | 4 | | | | |
| Q | J McNally | 6 | 4 | 6 | | | | | 3 | G Andreozzi | 6$^5$ | 0$^r$ | | | | |
| WC | S Riffice | 4 | 6 | 4 | Q | J McNally | 5 | 1 | | | | | | | | |
| | | | | | 3 | G Andreozzi | 7 | 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 | A Menéndez Maceiras | 5 | 0$^r$ | | | | | | | | |
| S Kozlov | 6 | 6 | | | S Kozlov | 7 | 4 | | | | | | | | |
| E Karlovskiy | 2 | 4 | | | | | | | S Kozlov | 2 | 3 | | | | |
| L Saville | 6 | 3 | 6$^3$ | | | | | 12 | J Kubler | 6 | 6 | | | | |
| A Vukic | 3 | 6 | 7$^7$ | | A Vukic | 3 | 2 | | | | | | | | |
| | | | | 12 | J Kubler | 6 | 6 | | | | | | | | |
| | | | | | | | | | | | | 12 | J Kubler | 6 | 6 |
| | | | | | | | | | | | | 14 | C Eubanks | 4 | 3 |
| | | | | 14 | C Eubanks | 6 | 6 | | | | | | | | |
| Jared Hiltzik | 6 | 3 | 6 | | J Hiltzik | 3 | 3 | | | | | | | | |
| T Smyczek | 2 | 6 | 3 | | | | | 14 | C Eubanks | 7$^7$ | 6 | | | | |
| S Mukund | 4 | 4 | | | | | | | E Escobedo | 6$^2$ | 4 | | | | |
| E Escobedo | 6 | 6 | | | E Escobedo | 5 | | | | | | | | | |
| | | | | 2 | M Ebden | 0$^r$ | | | | | | | | | |