# 2019 Nordic Naturals Challenger – Singles

Thanasi Kokkinakis was the defending champion but lost in the second round to Egor Gerasimov.
Steve Johnson won the title after defeating Dominik Köpfer 6–4, 7–6$^{(7–4)}$ in the final.

## Seeds

All seeds receive a bye into the second round.
* Damir Džumhur (quarterfinals)
* Steve Johnson (champion)
* Taro Daniel (quarterfinals)
* Dominik Köpfer (final)
* Bjorn Fratangelo (third round)
* Egor Gerasimov (semifinals)
* Marcos Giron (quarterfinals)
* Michael Mmoh (second round)
* Enzo Couacaud (second round)
* Go Soeda (quarterfinals)
* Mitchell Krueger (second round)
* Emilio Gómez (third round)
* Christopher Eubanks (second round)
* Ramkumar Ramanathan (second round)
* Darian King (withdrew)
* Ruben Bemelmans (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 |
| 1 | Damir Džumhur | 1 | 6 | 5 | | | | | | | | |
| | Ernesto Escobedo | 6 | 3 | 7 | | | | | | | | |
| | Ernesto Escobedo | 6 | 3 | 7 | | Ernesto Escobedo | 4 | 3 | | | | |
| | | | | | 4 | Dominik Köpfer | 6 | 6 | | | | |
| 4 | Dominik Köpfer | 6 | 6 | | 4 | Dominik Köpfer | 6 | 6 | | | | |
| 7 | Marcos Giron | 1 | 4 | | | | | | | | | |
| 7 | Marcos Giron | 1 | 4 | | | | | | 4 | Dominik Köpfer | 4 | 6$^4$ |
| | | | | | | | | | 2 | Steve Johnson | 6 | 7$^7$ |
| 6 | Egor Gerasimov | 6 | 6 | | | | | | | | | | 2 | Steve Johnson | 6 | 7$^7$ |
| 3 | Taro Daniel | 3 | 4 | | | | | | | | | |
| 3 | Taro Daniel | 3 | 4 | | 6 | Egor Gerasimov | 2 | 1 | | | | |
| | | | | | 2 | Steve Johnson | 6 | 6 | | | | |
| 10 | Go Soeda | 3 | 6$^4$ | | 2 | Steve Johnson | 6 | 6 | | | | |
| 2 | Steve Johnson | 6 | 7$^7$ | | | | | | | | | |

### 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 | D Džumhur | 6 | 6 | | | | | | | | | | | |
| Q | K Smith | 6 | 6 | | Q | K Smith | 4 | 4 | | | | | | | | | | | |
| WC | B Holt | 4 | 3 | | | | | | | 1 | D Džumhur | 6$^6$ | 6 | 7$^{11}$ | | | | | |
| WC | D Young | 4 | 2 | | | | | | | | L Lacko | 7$^8$ | 3 | 6$^9$ | | | | | |
| | L Lacko | 6 | 6 | | | L Lacko | 7$^7$ | 7$^7$ | | | | | | | | | | | |
| | | | | | 13 | C Eubanks | 6$^1$ | 6$^5$ | | | | | | | | | | | |
| | | | | | | | | | | | | | | | 1 | D Džumhur | 1 | 6 | 5 |
| | | | | | | | | | | | | | | | | E Escobedo | 6 | 3 | 7 |
| | | | | | 11 | M Krueger | 4 | 7$^8$ | 2 | | | | | | | | | | |
| | E Escobedo | 6 | 6 | | | E Escobedo | 6 | 6$^6$ | 6 | | | | | | | | | | |
| WC | J Brooksby | 2 | 2 | | | | | | | | E Escobedo | 7$^7$ | 6$^5$ | 7$^{14}$ | | | | | |
| LL | S Verbeek | 6 | 6$^3$ | 2 | | | | | | 5 | B Fratangelo | 6$^2$ | 7$^7$ | 6$^{12}$ | | | | | |
| | J Sinner | 3 | 7$^7$ | 6 | | J Sinner | 6$^6$ | 3 | | | | | | | | | | | |
| | | | | | 5 | B Fratangelo | 7$^8$ | 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 |
| | | | | 4 | D Köpfer | 6 | 6 | | | | | | | | | | |
| | J Ward | 4 | 2 | | Z Li | 3 | 4 | | | | | | | | | | |
| | Z Li | 6 | 6 | | | | | | 4 | D Köpfer | 6 | 7$^7$ | | | | | |
| WC | R Harrison | 4$^r$ | | | | | | | Alt | A Sarkissian | 3 | 6$^2$ | | | | | |
| Alt | A Sarkissian | 5 | | Alt | A Sarkissian | 6$^2$ | 6 | 6 | | | | | | | | | |
| | | | | 16 | R Bemelmans | 7$^7$ | 1 | 2 | | | | | | | | | |
| | | | | | | | | | | | | | | 4 | D Köpfer | 6 | 6 |
| | | | | | | | | | | | | | | 7 | M Giron | 1 | 4 |
| | | | | 9 | E Couacaud | 6 | 2 | 2 | | | | | | | | | |
| | B Gojo | 6 | 6 | | B Gojo | 1 | 6 | 6 | | | | | | | | | |
| | M Arévalo | 4 | 1 | | | | | | | B Gojo | 6 | 6$^2$ | 4 | | | | |
| ITF | L Glasspool | 6$^5$ | 4 | | | | | | 7 | M Giron | 3 | 7$^7$ | 6 | | | | |
| ITF | Ma Redlicki | 7$^7$ | 6 | ITF | Ma Redlicki | 2 | 3 | | | | | | | | | | |
| | | | | 7 | M Giron | 6 | 6 | | | | | | | | | | |

### 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 | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 6 | E Gerasimov | 7$^7$ | 6 | | | | | | | | | |
| | T Kokkinakis | 6 | 1 | | | T Kokkinakis | 6$^2$ | 4 | | | | | | | | | |
| Q | V Uzhylovskyi | 2 | 0$^r$ | | | | | | 6 | E Gerasimov | 6 | 7 | | | | | |
| | A Santillan | 6 | 6 | | | | | | 12 | E Gómez | 3 | 5 | | | | | |
| ITF | T van Rijthoven | 3 | 4 | | | A Santillan | 6$^4$ | 5 | | | | | | | | | |
| | | | | | 12 | E Gómez | 7$^7$ | 7 | | | | | | | | | |
| | | | | | | | | | | | | | | 6 | E Gerasimov | 6 | 6 |
| | | | | | | | | | | | | | | 3 | T Daniel | 3 | 4 |
| | | | | | Alt | Mi Redlicki | 6 | 6 | | | | | | | | | |
| | M Janvier | 6 | 4 | 6 | | M Janvier | 3 | 4 | | | | | | | | | |
| | D-h Lee | 4 | 6 | 4 | | | | | Alt | Mi Redlicki | 6 | 5 | 6$^3$ | | | | |
| WC | S Riffice | 6 | 6 | | | | | | 3 | T Daniel | 3 | 7 | 7$^7$ | | | | |
| | Yo Watanuki | 2 | 4 | | WC | S Riffice | 4 | 0 | | | | | | | | | |
| | | | | | 3 | T Daniel | 6 | 6 | | | | | | | | | |

#### Section 4

| 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 |
| | | | | | 8 | M Mmoh | 5 | 6 | 4 | | | | | | | | |
| | M Purcell | 7 | 7$^9$ | | | M Purcell | 7 | 1 | 6 | | | | | | | | |
| ITF | M Cressy | 5 | 6$^7$ | | | | | | | | M Purcell | 6$^3$ | 3 | | | | |
| | JC Aragone | 4 | 2 | | | | | | | 10 | G Soeda | 7$^7$ | 6 | | | | |
| ITF | E Hoyt | 6 | 6 | | ITF | E Hoyt | 6$^3$ | 5 | | | | | | | | | |
| | | | | | 10 | G Soeda | 7$^7$ | 7 | | | | | | | | | |
| | | | | | | | | | | | | | | 10 | G Soeda | 3 | 6$^4$ |
| | | | | | | | | | | | | | | 2 | S Johnson | 6 | 7$^7$ |
| | | | | | 14 | R Ramanathan | 6$^2$ | 4 | | | | | | | | | |
| Alt | D Novikov | 2 | 6 | 0 | | L Broady | 7$^7$ | 6 | | | | | | | | | |
| | L Broady | 6 | 4 | 6 | | | | | | | L Broady | 5 | 1 | | | | |
| | R Quiroz | 6 | 6 | | | | | | | 2 | S Johnson | 7 | 6 | | | | |
| | A Harris | 3 | 3 | | | R Quiroz | 1 | 2 | | | | | | | | | |
| | | | | | 2 | S Johnson | 6 | 6 | | | | | | | | | |