# 2019 Jinan International Open – Men's singles

Alexei Popyrin was the defending champion but chose not to defend his title.
Zhang Zhizhen won the title after defeating Go Soeda 7–5, 2–6, 6–4 in the final.

## Seeds

All seeds receive a bye into the second round.
* Prajnesh Gunneswaran (quarterfinals)
* Kwon Soon-woo (semifinals)
* Matthew Ebden (second round)
* James Duckworth (third round)
* Tatsuma Ito (third round)
* Yasutaka Uchiyama (second round)
* Go Soeda (final)
* Steven Diez (second round)
* Peđa Krstin (second round)
* Hiroki Moriya (second round)
* Enrique López Pérez (semifinals)
* Bai Yan (second round)
* Li Zhe (quarterfinals)
* Max Purcell (quarterfinals)
* Roberto Ortega Olmedo (second round)
* Akira Santillan (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 | Semifinals | Final | Final | Final | Final | Final |
| 1 | Prajnesh Gunneswaran | 6$^2$ | 6 | 3 | | | | | | | | | | |
| 7 | Go Soeda | 7$^7$ | 3 | 6 | | | | | | | | | | |
| 7 | Go Soeda | 7$^7$ | 3 | 6 | 7 | Go Soeda | 4 | 7$^7$ | 6 | | | | | |
| | | | | | 11 | Enrique López Pérez | 6 | 6$^3$ | 2 | | | | | |
| 13 | Li Zhe | 3 | 7$^7$ | 3 | 11 | Enrique López Pérez | 6 | 6$^3$ | 2 | | | | | |
| 11 | Enrique López Pérez | 6 | 6$^5$ | 6 | | | | | | | | | | |
| 11 | Enrique López Pérez | 6 | 6$^5$ | 6 | | | | | | 7 | Go Soeda | 5 | 6 | 4 |
| | | | | | | | | | | WC | Zhang Zhizhen | 7 | 2 | 6 |
| WC | Zhang Zhizhen | 7$^7$ | 6 | | | | | | | | | | | | WC | Zhang Zhizhen | 7 | 2 | 6 |
| 14 | Max Purcell | 6$^3$ | 1 | | | | | | | | | | | |
| 14 | Max Purcell | 6$^3$ | 1 | | WC | Zhang Zhizhen | 6 | 6 | | | | | | |
| | | | | | 2 | Kwon Soon-woo | 4 | 3 | | | | | | |
| | Teymuraz Gabashvili | 6 | 3 | 4 | 2 | Kwon Soon-woo | 4 | 3 | | | | | | |
| 2 | Kwon Soon-woo | 3 | 6 | 6 | | | | | | | | | | |

### 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 | P Gunneswaran | 6 | 6 | | | | | | | | | | |
| | TK Wang | 6 | 5 | 3 | Q | R Tokuda | 2 | 2 | | | | | | | | | | |
| Q | Renta Tokuda | 3 | 7 | 6 | | | | | | 1 | P Gunneswaran | 6 | 7$^7$ | | | | | |
| | T-l Wu | 6 | 6 | | | | | | | | T-l Wu | 4 | 6$^3$ | | | | | |
| | L Saville | 3 | 1 | | | T-l Wu | 5 | 6 | 7 | | | | | | | | | |
| | | | | | 15 | R Ortega Olmedo | 7 | 2 | 5 | | | | | | | | | |
| | | | | | | | | | | | | | | 1 | P Gunneswaran | 6$^2$ | 6 | 3 |
| | | | | | | | | | | | | | | 7 | G Soeda | 7$^7$ | 3 | 6 |
| | | | | | 10 | H Moriya | 3 | 5 | | | | | | | | | | |
| WC | D Wu | 6 | 6 | | WC | D Wu | 6 | 7 | | | | | | | | | | |
| | C Altamirano | 4 | 4 | | | | | | | WC | D Wu | 2 | 1 | | | | | |
| | I Sijsling | 3 | 2 | | | | | | | 7 | G Soeda | 6 | 6 | | | | | |
| | G Oliveira | 6 | 6 | | | G Oliveira | 3 | 0$^r$ | | | | | | | | | | |
| | | | | | 7 | G Soeda | 6 | 1 | | | | | | | | | | |

#### 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 | Quarterfinals |
| | | | | | 4 | J Duckworth | 6 | 6 | | | | | | | | | | |
| | Ze Zhang | 6 | 6 | | | Ze Zhang | 1 | 4 | | | | | | | | | | |
| Alt | F Sun | 3 | 4 | | | | | | | 4 | J Duckworth | 6$^3$ | 3 | | | | | |
| | I Nedelko | 4 | 7 | 6 | | | | | | 13 | Z Li | 7$^7$ | 6 | | | | | |
| | J-s Nam | 6 | 5 | 3 | | I Nedelko | 6$^6$ | 6$^7$ | | | | | | | | | | |
| | | | | | 13 | Z Li | 7$^8$ | 7$^9$ | | | | | | | | | | |
| | | | | | | | | | | | | | | 13 | Z Li | 3 | 7$^7$ | 3 |
| | | | | | | | | | | | | | | 11 | E López Pérez | 6 | 6$^5$ | 6 |
| | | | | | 11 | E López Pérez | 7$^7$ | 6 | | | | | | | | | | |
| | Y-s Chung | 2 | 4 | | | K Uchida | 6$^4$ | 3 | | | | | | | | | | |
| | K Uchida | 6 | 6 | | | | | | | 11 | E López Pérez | 7$^7$ | 6 | | | | | |
| | A Vukic | 3 | 6 | 3 | | | | | | | J Ward | 6$^4$ | 3 | | | | | |
| | J Ward | 6 | 3 | 6 | | J Ward | 4 | 7$^7$ | 6 | | | | | | | | | |
| | | | | | 6 | Y Uchiyama | 6 | 6$^4$ | 0 | | | | | | | | | |

### 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 | S Diez | 3 | 3 | | | | | | | | | | |
| WC | Zh Zhang | 2 | 6 | 6 | WC | Zh Zhang | 6 | 6 | | | | | | | | | | |
| WC | J Cui | 6 | 3 | 3 | | | | | | WC | Zh Zhang | 6 | 6 | | | | | |
| | Shintaro Imai | 5 | 6 | 2 | | | | | | | C-h Tseng | 4 | 3 | | | | | |
| | C-h Tseng | 7 | 4 | 6 | | C-h Tseng | 7$^7$ | 7$^7$ | | | | | | | | | | |
| | | | | | 9 | P Krstin | 6$^2$ | 6$^1$ | | | | | | | | | | |
| | | | | | | | | | | | | | | | WC | Zh Zhang | 7$^7$ | 6 |
| | | | | | | | | | | | | | | | 14 | M Purcell | 6$^3$ | 1 |
| | | | | | 14 | M Purcell | 6 | 1 | 6 | | | | | | | | | |
| Q | Evan Song | 6 | 6 | | Q | E Song | 3 | 6 | 3 | | | | | | | | | |
| | H Bourchier | 4 | 3 | | | | | | | 14 | M Purcell | 2 | 6 | 6 | | | | |
| LL | Jin Yuquan | 3 | 1 | | | | | | | | F Ferreira Silva | 6 | 4 | 3 | | | | |
| | F Ferreira Silva | 6 | 6 | | | F Ferreira Silva | 6 | 6 | | | | | | | | | | |
| | | | | | 3 | M Ebden | 4 | 4 | | | | | | | | | | |

#### 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 | Quarterfinals |
| | | | | | 5 | T Ito | 6 | 6 | | | | | | | | | | |
| | Baptiste Crepatte | 6 | 7$^8$ | | | B Crepatte | 4 | 0 | | | | | | | | | | |
| | T-h Yang | 4 | 6$^6$ | | | | | | | 5 | T Ito | 5 | 3 | | | | | |
| | T Gabashvili | 6 | 5 | 6 | | | | | | | T Gabashvili | 7 | 6 | | | | | |
| | Jacob Grills | 4 | 7 | 1 | | T Gabashvili | 4 | 6 | 6 | | | | | | | | | |
| | | | | | 12 | Y Bai | 6 | 3 | 2 | | | | | | | | | |
| | | | | | | | | | | | | | | | T Gabashvili | 6 | 3 | 4 |
| | | | | | | | | | | | | | | 2 | S-w Kwon | 3 | 6 | 6 |
| | | | | | 16 | A Santillan | 6 | 6 | | | | | | | | | | |
| | S Mukund | 3 | 3 | | | S Sekiguchi | 1 | 2 | | | | | | | | | | |
| | Shuichi Sekiguchi | 6 | 6 | | | | | | | 16 | A Santillan | 6$^6$ | 4 | | | | | |
| WC | Y He | 6 | 6 | | | | | | | 2 | S-w Kwon | 7$^8$ | 6 | | | | | |
| WC | X Gao | 1 | 4 | | WC | Y He | 4 | 2 | | | | | | | | | | |
| | | | | | 2 | S-w Kwon | 6 | 6 | | | | | | | | | | |