| Singles | |
|---|---|
| 2023 Poznań Open | |
| Champion |  Mariano Navone |
| Runner-up |  Tomás Barrios Vera |
| Score | 7–5, 6–3 |
Arthur Rinderknech was the defending champion [1] but chose not to defend his title.
Mariano Navone won the title after defeating Tomás Barrios Vera 7–5, 6–3 in the final.
Alexander Shevchenko (first round) Federico Coria (first round)
Tomáš Macháč (first round) Facundo Díaz Acosta (quarterfinals) Tomás Barrios Vera (final)
Geoffrey Blancaneaux (first round, retired)
Damir Džumhur (first round) Dalibor Svrčina (first round)| Semifinals | Final | ||||||||||||
| 5 | Tomás Barrios Vera | 6 | 1 | 6 | |||||||||
| Zdeněk Kolář | 4 | 6 | 3 | ||||||||||
| 5 | Tomás Barrios Vera | 5 | 3 | ||||||||||
| Mariano Navone | 7 | 6 | |||||||||||
| Alt |  Timo Stodder | 2 | 0 | ||||||||||
| Mariano Navone | 6 | 6 | |||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | A Shevchenko | 3 | 2 | ||||||||||||||||||||||||
| WC |  Dali Blanch | 6 | 6 | WC | D Blanch | 6 | 3 | 4 | |||||||||||||||||||
| Q | U Blanch | 77 | 0 | Q | U Blanch | 1 | 6 | 6 | |||||||||||||||||||
 V Sachko | 65 | 0r | Q | U Blanch | 3 | 7 | 5 | ||||||||||||||||||||
| G Mpetshi Perricard | 710 | 3 | 713 | 5 | T Barrios Vera | 6 | 5 | 7 | |||||||||||||||||||
| J Menšík | 68 | 6 | 611 | G Mpetshi Perricard | 62 | 3 | |||||||||||||||||||||
| Alt |  M Houkes | 1 | 62 | 5 | T Barrios Vera | 77 | 6 | ||||||||||||||||||||
| 5 | T Barrios Vera | 6 | 77 | 5 | T Barrios Vera | 6 | 1 | 6 | |||||||||||||||||||
| 4 | F Díaz Acosta | 3 | 6 | 6 | Z Kolář | 4 | 6 | 3 | |||||||||||||||||||
 L Giustino | 6 | 2 | 4 | 4 | F Díaz Acosta | 6 | 2 | 6 | |||||||||||||||||||
 S Nagal | 6 | 6 | S Nagal | 1 | 6 | 4 | |||||||||||||||||||||
| WC |  L Borg | 2 | 3 | 4 | F Díaz Acosta | 3 | 1 | ||||||||||||||||||||
| LL |  C Taberner | 6 | 77 | Z Kolář | 6 | 6 | |||||||||||||||||||||
 K Żuk | 4 | 63 | LL | C Taberner | 4 | 1 | |||||||||||||||||||||
| Z Kolář | 6 | 6 | Z Kolář | 6 | 6 | ||||||||||||||||||||||
| 7 | D Džumhur | 2 | 2 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | D Svrčina | 5 | 64 | ||||||||||||||||||||||||
| Pol Martín Tiffon | 7 | 77 | P Martín Tiffon | 4 | 6 | 0 | |||||||||||||||||||||
| Q | D Jordà Sanchis | 62 | 3 | Alt | T Stodder | 6 | 3 | 6 | |||||||||||||||||||
| Alt | Timo Stodder | 77 | 6 | Alt | T Stodder | 6 | 6 | ||||||||||||||||||||
| D Michalski | 5 | 6 | 6 | D Michalski | 1 | 4 | |||||||||||||||||||||
 M Valkusz | 7 | 4 | 1 | D Michalski | 6 | 6 | |||||||||||||||||||||
| Q | R Molleker | 7 | 77 | Q | R Molleker | 4 | 2 | ||||||||||||||||||||
| 3 | T Macháč | 5 | 61 | Alt | T Stodder | 2 | 0 | ||||||||||||||||||||
| 6 | G Blancaneaux | 2 | 3r | M Navone | 6 | 6 | |||||||||||||||||||||
| Q | M Guinard | 6 | 4 | Q | M Guinard | 6 | 6 | ||||||||||||||||||||
| Q |  J Kym | 6 | 6 | Q | J Kym | 3 | 4 | ||||||||||||||||||||
| Q |  N Oberleitner | 1 | 2 | Q | M Guinard | 5 | 77 | 2 | |||||||||||||||||||
| WC | M Kaśnikowski | 6 | 2 | 77 | M Navone | 7 | 63 | 6 | |||||||||||||||||||
| H Laaksonen | 1 | 6 | 64 | WC | M Kaśnikowski | 4 | 64 | ||||||||||||||||||||
| M Navone | 3 | 6 | 6 | M Navone | 6 | 77 | |||||||||||||||||||||
| 2 | F Coria | 6 | 3 | 1 | |||||||||||||||||||||||
Noah Rubin was the defending champion, but chose not to participate this year.
Omar Jasika and Naoki Nakagawa are the defending champions, but they chose not to participate.
Félix Auger-Aliassime and Denis Shapovalov won the title, defeating Brandon Holt and Riley Smith in the final, 7–5, 7–6(7–3).
Julio Peralta and Hans Podlipnik-Castillo were the defending champions but chose to defend their title with different partners. Peralta partnered Íñigo Cervantes but lost in the first round to Fabiano de Paula and Fabrício Neis. Podlipnik-Castillo partnered Max Schnur but lost in the first round to Marcelo Tomás Barrios Vera and Nicolás Jarry.
Damir Džumhur was the defending champion, but retired from his quarterfinal match against Jordan Thompson.
Danilo Petrović was the defending champion but chose not to defend his title.
Cristian Garín was the defending champion, but chose not to defend his title.
Pedro Sousa was the defending champion but chose not to defend his title.
Emil Ruusuvuori was the defending champion but chose not to defend his title.
Arthur Rinderknech was the defending champion but lost in the semifinals to Benjamin Bonzi.
Antonio Šančić and Tristan-Samuel Weissborn were the defending champions but chose not to defend their title.
Juan Pablo Varillas was the defending champion but lost in the quarterfinals to Marcelo Tomás Barrios Vera.
Francisco Cerúndolo was the defending champion but chose not to defend his title.
Jenson Brooksby was the defending champion but chose not to defend his title.
Federico Coria was the defending champion but chose not to defend his title.
Bernabé Zapata Miralles was the defending champion but chose not to defend his title.
Tomás Barrios Vera was the defending champion but chose not to defend his title.
Antoine Bellier was the defending champion but lost in the first round to Alexis Galarneau.
Luca Nardi was the defending champion but chose not to defend his title.
Leandro Riedi was the defending champion but lost in the first round to Damir Džumhur.
Tomás Barrios Vera was the defending champion but lost in the quarterfinals to Matías Soto.