| Men's singles | |
|---|---|
| 2023 Shenzhen Longhua Open | |
| Champion |  Aleksandar Kovacevic |
| Runner-up |  Nuno Borges |
| Score | 7–6(7–4), 7–6(7–5) |
Zhang Zhizhen was the defending champion [1] but chose not to defend his title.
Aleksandar Kovacevic won the title after defeating Nuno Borges 7–6(7–4), 7–6(7–5) in the final.
Thanasi Kokkinakis (second round)
Pedro Cachin (semifinals) Nuno Borges (final)
Fabio Fognini (first round) James Duckworth (second round) Aleksandar Kovacevic (champion)
Térence Atmane (second round)
Hsu Yu-hsiou (quarterfinals)| Semifinals | Final | ||||||||||||
| Q |  Egor Gerasimov | 2 | 1 | ||||||||||
| 3 | Nuno Borges | 6 | 6 | ||||||||||
| 3 | Nuno Borges | 64 | 65 | ||||||||||
| 6 | Aleksandar Kovacevic | 77 | 77 | ||||||||||
| 6 | Aleksandar Kovacevic | 6 | 79 | ||||||||||
| 2 | Pedro Cachin | 4 | 67 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | T Kokkinakis | 6 | 3 | 6 | |||||||||||||||||||||||
| Q |  C Sinclair | 2 | 6 | 3 | 1 | T Kokkinakis | 3 | 4 | |||||||||||||||||||
 B Zhukayev | 6 | 6 | B Zhukayev | 6 | 6 | ||||||||||||||||||||||
| Q |  Z Li | 4 | 4 | B Zhukayev | 77 | 2 | 3 | ||||||||||||||||||||
| L Tu | 6 | 4 | 4 | Q | E Gerasimov | 64 | 6 | 6 | |||||||||||||||||||
| Q | E Gerasimov | 4 | 6 | 6 | Q | E Gerasimov | 77 | 6 | |||||||||||||||||||
| L Giustino | 64 | 3 | 7 | T Atmane | 64 | 3 | |||||||||||||||||||||
| 7 | T Atmane | 77 | 6 | Q | E Gerasimov | 2 | 1 | ||||||||||||||||||||
| 3 | N Borges | 7 | 6 | 3 | N Borges | 6 | 6 | ||||||||||||||||||||
 S Diez | 5 | 2 | 3 | N Borges | 6 | 6 | |||||||||||||||||||||
| Y Bu | 3 | 6 | 2 | Y Bu | 3 | 4 | |||||||||||||||||||||
| J McCabe | 6 | 3 | 0r | 3 | N Borges | 77 | 6 | ||||||||||||||||||||
| L Saville | 2 | 5 | 8 | Y-h Hsu | 60 | 0 | |||||||||||||||||||||
| C-h Tseng | 6 | 7 | C-h Tseng | 3 | 4 | ||||||||||||||||||||||
| Q | R Te | 2 | 1 | 8 | Y-h Hsu | 6 | 6 | ||||||||||||||||||||
| 8 | Y-h Hsu | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | A Kovacevic | 6 | 6 | ||||||||||||||||||||||||
| P Sekulic | 1 | 4 | 6 | A Kovacevic | 6 | 6 | |||||||||||||||||||||
| WC | S Tang | 3 | 4 | A Kachmazov | 1 | 4 | |||||||||||||||||||||
| A Kachmazov | 6 | 6 | 6 | A Kovacevic | 6 | 6 | |||||||||||||||||||||
| WC | Sun Qian | 3 | 3 | D Yevseyev | 2 | 4 | |||||||||||||||||||||
| Q | J Cui | 6 | 6 | Q | J Cui | 4 | 0 | ||||||||||||||||||||
| D Yevseyev | 6 | 78 | D Yevseyev | 6 | 6 | ||||||||||||||||||||||
| 4/WC | F Fognini | 4 | 66 | 6 | A Kovacevic | 6 | 79 | ||||||||||||||||||||
| 5 | J Duckworth | 6 | 77 | 2 | P Cachin | 4 | 67 | ||||||||||||||||||||
 K Uchida | 0 | 62 | 5 | J Duckworth | 6 | 5 | 2 | ||||||||||||||||||||
| J Jung | 6 | 2 | 6 | J Jung | 3 | 7 | 6 | ||||||||||||||||||||
| E Donskoy | 4 | 6 | 4 | J Jung | 3 | 4 | |||||||||||||||||||||
 Dominik Palán | 4 | 64 | 2 | P Cachin | 6 | 6 | |||||||||||||||||||||
| T-l Wu | 6 | 77 | T-l Wu | 65 | 77 | 66 | |||||||||||||||||||||
| Q | Y Bai | 4 | 3 | 2 | P Cachin | 77 | 63 | 78 | |||||||||||||||||||
| 2 | P Cachin | 6 | 6 | ||||||||||||||||||||||||
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