# 2019 Shenzhen Longhua Open – Men's singles

Miomir Kecmanović was the defending champion but chose not to defend his title.
Zhang Zhizhen won the title after defeating Li Zhe 6–3, 4–6, 6–1 in the final.

## Seeds

All seeds receive a bye into the second round.
* Kwon Soon-woo (third round)
* Alejandro Davidovich Fokina (withdrew)
* Yūichi Sugita (third round)
* Go Soeda (quarterfinals)
* Jason Jung (quarterfinals)
* Steven Diez (second round)
* Malek Jaziri (second round, retired)
* Zhang Zhizhen (champion)
* Enrique López Pérez (third round)
* Ramkumar Ramanathan (second round)
* Danilo Petrović (withdrew)
* Christopher Eubanks (second round)
* Frederico Ferreira Silva (semifinals, retired)
* Denis Istomin (second round, retired)
* Mohamed Safwat (semifinals)
* Bai Yan (third 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 |
| 15 | Mohamed Safwat | 7 | 6 | | | | | | | | | | |
| | Denis Yevseyev | 5 | 2 | | | | | | | | | | |
| | Denis Yevseyev | 5 | 2 | | 15 | Mohamed Safwat | 4 | 2 | | | | | |
| | | | | | | Li Zhe | 6 | 6 | | | | | |
| | Roman Safiullin | 7$^7$ | 1 | 5 | | Li Zhe | 6 | 6 | | | | | |
| | Li Zhe | 6$^5$ | 6 | 7 | | | | | | | | | |
| | Li Zhe | 6$^5$ | 6 | 7 | | | | | | Li Zhe | 3 | 6 | 1 |
| | | | | | | | | | 8 | Zhang Zhizhen | 6 | 4 | 6 |
| 8 | Zhang Zhizhen | 7$^7$ | 6 | | | | | | | | | | | 8 | Zhang Zhizhen | 6 | 4 | 6 |
| 4 | Go Soeda | 6$^0$ | 4 | | | | | | | | | | |
| 4 | Go Soeda | 6$^0$ | 4 | | 8 | Zhang Zhizhen | 6 | 4 | | | | | |
| | | | | | 13 | Frederico Ferreira Silva | 1 | 1$^r$ | | | | | |
| 5 | Jason Jung | 6$^5$ | 6 | 4 | 13 | Frederico Ferreira Silva | 1 | 1$^r$ | | | | | |
| 13 | Frederico Ferreira Silva | 7$^7$ | 4 | 6 | | | | | | | | | |

### Top half
#### Section 1

| 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 |
| | | | | 1 | S-w Kwon | 6 | 6 | | | | | | | | | |
| | K Uchida | 5 | 1 | | D-h Lee | 2 | 2 | | | | | | | | | |
| | D-h Lee | 7 | 6 | | | | | 1 | S-w Kwon | 4 | 6$^6$ | | | | | |
| | S Doumbia | 3 | 3 | | | | | 15 | M Safwat | 6 | 7$^8$ | | | | | |
| | I Nedelko | 6 | 6 | | I Nedelko | 6$^3$ | 1 | | | | | | | | | |
| | | | | 15 | M Safwat | 7$^7$ | 6 | | | | | | | | | |
| | | | | | | | | | | | | | 15 | M Safwat | 7 | 6 |
| | | | | | | | | | | | | | | D Yevseyev | 5 | 2 |
| | | | | 12 | C Eubanks | 5 | 2 | | | | | | | | | |
| | T Gabashvili | 6 | 6 | | T Gabashvili | 7 | 6 | | | | | | | | | |
| WC | Li Yuanfeng | 3 | 2 | | | | | | T Gabashvili | 4 | 7 | 6$^4$ | | | | |
| | D Yevseyev | 6 | 6 | | | | | | D Yevseyev | 6 | 5 | 7$^7$ | | | | |
| WC | C Wang | 0 | 1 | | D Yevseyev | 6 | 6 | | | | | | | | | |
| | | | | 6 | S Diez | 3 | 2 | | | | | | | | | |

#### 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 |
| | | | | 3 | Y Sugita | 7 | 6 | | | | | | | | | | |
| | F Sun | 6 | 6 | | F Sun | 5 | 2 | | | | | | | | | | |
| LL | M Sabanov | 4 | 4 | | | | | | 3 | Y Sugita | 6 | 5 | 3 | | | | |
| | D Kalenichenko | 6$^0$ | 4 | | | | | | | R Safiullin | 2 | 7 | 6 | | | | |
| | R Safiullin | 7$^7$ | 6 | | R Safiullin | 4 | 7 | 2 | | | | | | | | | |
| | | | | 14 | D Istomin | 6 | 5 | 0$^r$ | | | | | | | | | |
| | | | | | | | | | | | | | | R Safiullin | 7$^7$ | 1 | 5 |
| | | | | | | | | | | | | | | Z Li | 6$^5$ | 6 | 7 |
| | | | | 9 | E López Pérez | 6 | 6 | | | | | | | | | | |
| | Y-s Chung | 4 | 3 | Alt | J Forejtek | 1 | 4 | | | | | | | | | | |
| Alt | J Forejtek | 6 | 6 | | | | | | 9 | E López Pérez | 3 | 3 | | | | | |
| | J-s Nam | 2 | 1 | | | | | | | Z Li | 6 | 6 | | | | | |
| | Z Li | 6 | 6 | | Z Li | 4 | 6 | 5 | | | | | | | | | |
| | | | | 7 | M Jaziri | 6 | 4 | 0$^r$ | | | | | | | | | |

### 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 |
| | | | | | 8 | Zh Zhang | 6 | 6 | | | | | | | | | | |
| WC | J Cui | 7$^8$ | 1 | 4 | | G Oliveira | 0 | 1 | | | | | | | | | | |
| | G Oliveira | 6$^6$ | 6 | 6 | | | | | | 8 | Zh Zhang | 6 | 2 | | | | | |
| | B Gojo | 6 | 7$^7$ | | | | | | | | B Gojo | 2 | 1$^r$ | | | | | |
| | T van Rijthoven | 3 | 6$^5$ | | | B Gojo | 7$^7$ | 7$^9$ | | | | | | | | | | |
| | | | | | Q | F Reboul | 6$^5$ | 6$^7$ | | | | | | | | | | |
| | | | | | | | | | | | | | | | 8 | Zh Zhang | 7$^7$ | 6 |
| | | | | | | | | | | | | | | | 4 | G Soeda | 6$^0$ | 4 |
| | | | | | 16 | Y Bai | 6 | 7 | | | | | | | | | | |
| | K Sultanov | 6 | 6 | | | K Sultanov | 3 | 5 | | | | | | | | | | |
| | Sidharth Rawat | 2 | 2 | | | | | | | 16 | Y Bai | 6 | 3 | 3 | | | | |
| WC | Y Mo | 4 | 0 | | | | | | | 4 | G Soeda | 4 | 6 | 6 | | | | |
| | K Kravchuk | 6 | 6 | | | K Kravchuk | 7$^7$ | 4 | 5 | | | | | | | | | |
| | | | | | 4 | G Soeda | 6$^4$ | 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 | Quarterfinals |
| | | | | | 5 | J Jung | 6 | 6 | | | | | | | | | | |
| | B Sant'Anna | 6 | 6 | | | B Sant'Anna | 4 | 3 | | | | | | | | | | |
| WC | X Gao | 4 | 2 | | | | | | 5 | J Jung | 7$^7$ | 6 | | | | | | |
| | T-l Wu | 6 | 7 | | | | | | | T-l Wu | 6$^2$ | 4 | | | | | | |
| PR | N Barrientos | 3 | 5 | | | T-l Wu | 6 | 7$^8$ | | | | | | | | | | |
| | | | | | 10 | R Ramanathan | 3 | 6$^6$ | | | | | | | | | | |
| | | | | | | | | | | | | | | 5 | J Jung | 6$^5$ | 6 | 4 |
| | | | | | | | | | | | | | | 13 | F Ferreira Silva | 7$^7$ | 4 | 6 |
| | | | | | 13 | F Ferreira Silva | 6 | 6 | | | | | | | | | | |
| Q | Duan Jiaqi | 3 | 1 | | | T-h Yang | 3 | 0 | | | | | | | | | | |
| | T-h Yang | 6 | 6 | | | | | | 13 | F Ferreira Silva | 6$^5$ | 6 | 6 | | | | | |
| | D Wu | 1 | 7$^9$ | 3 | | | | | | C-h Tseng | 7$^7$ | 3 | 4 | | | | | |
| | C-h Tseng | 6 | 6$^7$ | 6 | | C-h Tseng | 7$^7$ | 2 | | | | | | | | | | |
| | | | | | LL | T Matsui | 6$^3$ | 1$^r$ | | | | | | | | | | |