| Singles | |
|---|---|
| 2023 Shanghai Challenger | |
| Champion |  Christopher O'Connell |
| Runner-up |  Yosuke Watanuki |
| Score | 6–3, 7–5 |
Yasutaka Uchiyama was the defending champion [1] but retired from his second round match against Christopher O'Connell.
O'Connell won the title after defeating Yosuke Watanuki 6–3, 7–5 in the final.
Christopher O'Connell (champion) Yosuke Watanuki (final) Marc Polmans (first round)
Shang Juncheng (semifinals)
Wu Tung-lin (second round) Bu Yunchaokete (second round)
Térence Atmane (second round) Rio Noguchi (first round)| Semifinals | Final | ||||||||||||
| 1 | Christopher O'Connell | 6 | 6 | ||||||||||
| Li Tu | 2 | 4 | |||||||||||
| 1 | Christopher O'Connell | 6 | 7 | ||||||||||
| 2 | Yosuke Watanuki | 3 | 5 | ||||||||||
| 4 | Shang Juncheng | 4 | 2 | ||||||||||
| 2 | Yosuke Watanuki | 6 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | C O'Connell | 6 | 6 | ||||||||||||||||||||||||
| L Saville | 4 | 0 | 1 | C O'Connell | 77 | 4 | |||||||||||||||||||||
| WC | Liu Hanyi | 1 | 64 | Y Uchiyama | 63 | 1r | |||||||||||||||||||||
| Y Uchiyama | 6 | 77 | 1 | C O'Connell | 6 | 6 | |||||||||||||||||||||
| Q | Mu Tao | 3 | 6 | 5 | Q | Y Bai | 0 | 2 | |||||||||||||||||||
| Q | Y Bai | 6 | 4 | 7 | Q | Y Bai | 6 | 6 | |||||||||||||||||||
 Dominik Palán | 6 | 6 | D Palán | 3 | 2 | ||||||||||||||||||||||
| 8 | R Noguchi | 2 | 4 | 1 | C O'Connell | 6 | 6 | ||||||||||||||||||||
| 3 | M Polmans | 1 | 3 | L Tu | 2 | 4 | |||||||||||||||||||||
 F Peliwo | 6 | 6 | F Peliwo | 65 | 2 | ||||||||||||||||||||||
| P Sekulic | 1 | 0 | L Tu | 77 | 6 | ||||||||||||||||||||||
| L Tu | 6 | 6 | L Tu | 78 | 6 | ||||||||||||||||||||||
 A Bellier | 6 | 7 | A Bellier | 66 | 2 | ||||||||||||||||||||||
| Q |  A Kadhe | 4 | 5 | A Bellier | 77 | 3 | 6 | ||||||||||||||||||||
| O Jasika | 3 | 61 | 7 | T Atmane | 65 | 6 | 4 | ||||||||||||||||||||
| 7 | T Atmane | 6 | 77 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | Y Bu | 6 | 6 | ||||||||||||||||||||||||
| WC | R Te | 2 | 4 | 6 | Y Bu | 1 | 4 | ||||||||||||||||||||
| H Moriya | 1 | 2 |  L Giustino | 6 | 6 | ||||||||||||||||||||||
| L Giustino | 6 | 6 | L Giustino | 1 | 4 | ||||||||||||||||||||||
| Alt | M Sasikumar | 3 | 4 | 4 | J Shang | 6 | 6 | ||||||||||||||||||||
| D Sweeny | 6 | 6 | D Sweeny | 4 | 3 | ||||||||||||||||||||||
| LL |  R Strombachs | 4 | 64 | 4 | J Shang | 6 | 6 | ||||||||||||||||||||
| 4 | J Shang | 6 | 77 | 4 | J Shang | 4 | 2 | ||||||||||||||||||||
| 5 | T-l Wu | 77 | 3 | 6 | 2 | Y Watanuki | 6 | 6 | |||||||||||||||||||
| WC | F Sun | 65 | 6 | 2 | 5 | T-l Wu | 6 | 1 | 2 | ||||||||||||||||||
| Q |  NH Lý | 5 | 6 | 6 | Q | NH Lý | 3 | 6 | 6 | ||||||||||||||||||
| Q |  N Chappell | 7 | 4 | 0 | Q | NH Lý | 2 | 0 | |||||||||||||||||||
| Q | Alafia Ayeni | 2 | 6 | 3 | 2 | Y Watanuki | 6 | 6 | |||||||||||||||||||
| SE |  Mikalai Haliak | 6 | 3 | 6 | SE | M Haliak | 1 | 1 | |||||||||||||||||||
| A Bolt | 4 | 0 | 2 | Y Watanuki | 6 | 6 | |||||||||||||||||||||
| 2 | Y Watanuki | 6 | 6 | ||||||||||||||||||||||||
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