| Singles | |
|---|---|
| 2023 International Challenger Zhangjiagang | |
| Champion |  Térence Atmane |
| Runner-up |  Mikalai Haliak |
| Score | 6–1, 6–2 |
Marc Polmans was the defending champion [1] but chose not to defend his title.
Térence Atmane won the title after defeating Mikalai Haliak 6–1, 6–2 in the final.
Bu Yunchaokete (first round) Térence Atmane (champion)
Kaichi Uchida (first round) Rio Noguchi (first round)
Li Tu (quarterfinals)
Jason Jung (withdrew)
Ričardas Berankis (semifinals) James McCabe (semifinals, retired)| Semifinals | Final | ||||||||||||
| 8 | James McCabe | 2 | 2r | ||||||||||
| Q | Mikalai Haliak | 6 | 3 | ||||||||||
| Q | Mikalai Haliak | 1 | 2 | ||||||||||
| 2 | Térence Atmane | 6 | 6 | ||||||||||
| 7 | Ričardas Berankis | 1 | 6 | 3 | |||||||||
| 2 | Térence Atmane | 6 | 3 | 6 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | Y Bu | 79 | 3 | 66 | |||||||||||||||||||||||
| WC | R Te | 67 | 6 | 78 | WC | R Te | 6 | 6 | |||||||||||||||||||
 F Peliwo | 6 | 3 | 6 | F Peliwo | 3 | 1 | |||||||||||||||||||||
 Dominik Palán | 2 | 6 | 2 | WC | R Te | 66 | 6 | 0 | |||||||||||||||||||
| Q |  Leonid Sheyngezikht | 4 | 1 | 8 | J McCabe | 78 | 3 | 6 | |||||||||||||||||||
 L Giustino | 6 | 6 | L Giustino | 4 | 6 | 1 | |||||||||||||||||||||
| L Saville | 63 | 6 | 3 | 8 | J McCabe | 6 | 3 | 6 | |||||||||||||||||||
| 8 | J McCabe | 77 | 2 | 6 | 8 | J McCabe | 2 | 2r | |||||||||||||||||||
| 4 | R Noguchi | 3 | 6 | 2 | Q | M Haliak | 6 | 3 | |||||||||||||||||||
| Q | Xiao Linang | 6 | 4 | 6 | Q | L Xiao | 4 | 1 | |||||||||||||||||||
| Q | Mikalai Haliak | 6 | 7 | Q | M Haliak | 6 | 6 | ||||||||||||||||||||
 M Sasikumar | 3 | 5 | Q | M Haliak | 6 | 6 | |||||||||||||||||||||
 E Zhu | 5 | 66 | LL | Y Takahashi | 4 | 4 | |||||||||||||||||||||
 S Sakellaridis | 7 | 78 | S Sakellaridis | 3 | 1 | ||||||||||||||||||||||
| Q | Cui Jie | 2 | 2 | LL | Y Takahashi | 6 | 6 | ||||||||||||||||||||
| LL | Y Takahashi | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | R Berankis | 6 | 7 | ||||||||||||||||||||||||
| Y Uchiyama | 4 | 5 | 7 | R Berankis | 6 | 6 | |||||||||||||||||||||
| Q | Liu Hanyi | 4 | 6 | 3 |  R Strombachs | 4 | 2 | ||||||||||||||||||||
| R Strombachs | 6 | 3 | 6 | 7 | R Berankis | 7 | 64 | 6 | |||||||||||||||||||
 NH Lý | 5 | 6 | 6 | LL |  C Sinclair | 5 | 77 | 1 | |||||||||||||||||||
| N Chappell | 7 | 3 | 2 | NH Lý | 3 | 6 | 1 | ||||||||||||||||||||
| LL | C Sinclair | 6 | 3 | 6 | LL | C Sinclair | 6 | 1 | 6 | ||||||||||||||||||
| 3 | K Uchida | 3 | 6 | 4 | 7 | R Berankis | 1 | 6 | 3 | ||||||||||||||||||
| 5 | L Tu | 6 | 6 | 2 | T Atmane | 6 | 3 | 6 | |||||||||||||||||||
| P Sekulic | 3 | 4 | 5 | L Tu | 6 | 6 | |||||||||||||||||||||
| Alt |  R Statham | 6 | 3 | 77 | Alt | R Statham | 2 | 2 | |||||||||||||||||||
| WC | H Li | 3 | 6 | 62 | 5 | L Tu | 3 | 5 | |||||||||||||||||||
| A Weber | 2 | 2 | 2 | T Atmane | 6 | 7 | |||||||||||||||||||||
| Alt | Alafia Ayeni | 6 | 6 | Alt | A Ayeni | 1 | 6 | 2 | |||||||||||||||||||
| WC | F Sun | 6 | 61 | 69 | 2 | T Atmane | 6 | 3 | 6 | ||||||||||||||||||
| 2 | T Atmane | 4 | 77 | 711 | |||||||||||||||||||||||
Benjamin Mitchell was the defending champion but chose not to defend his title.
Gaël Monfils was the defending champion, but lost in the second round to Yuki Bhambri.
Daniel Nestor and Édouard Roger-Vasselin were the defending champions, but chose not to participate together. Nestor played alongside Aisam-ul-Haq Qureshi, but lost in the first round to Rohan Bopanna and Donald Young. Roger-Vasselin teamed up with Steve Johnson, but lost in the first round to Jamie Murray and Bruno Soares.
Juan Sebastián Cabal and Robert Farah were the defending champions but Farah chose not to participate this year. Cabal played alongside Denys Molchanov, but lost in the semifinals to Max Mirnyi and Philipp Oswald.
Noah Rubin was the defending champion but chose not to defend his title.
Alex Bolt and Max Purcell were the defending champions but only Purcell chose to defend his title, partnering Lloyd Harris. Purcell lost in the semifinals to Joris De Loore and Marc Polmans.
Cedrik-Marcel Stebe was the defending champion but chose not to defend his title.
Cameron Norrie was the defending champion but chose not to defend his title.
Matthew Ebden was the defending champion but chose not to defend his title.
Yuki Bhambri was the defending champion but chose not to defend his title.
Jordan Thompson was the defending champion but chose not to defend his title.
Harold Mayot won the boys' singles tennis title at the 2020 Australian Open, defeating Arthur Cazaux in the final, 6–4, 6–1.
David Ionel and Leandro Riedi won the boys' doubles tennis title at the 2020 Australian Open, defeating Mikołaj Lorens and Kārlis Ozoliņš in the final, 6–7(8–10), 7–5, [10–4].
Aslan Karatsev was the defending champion but chose not to defend his title.
John Millman was the defending champion, but lost in the quarterfinals to James Duckworth.
Marc Polmans was the defending champion but chose not to participate.
This was the first edition of the tournament.
Juan Bautista Torres was the defending champion but chose not to defend his title.
Yasutaka Uchiyama was the defending champion but retired from his second round match against Christopher O'Connell.
Nikoloz Basilashvili was the defending champion but chose not to defend his title.