| Date: | 19 – 24 June |
| Edition: | 19th |
| Surface: | Clay |
| Location: | Poznań, Poland |
| Venue: | Park Tenisowy Olimpia |
| Champs: |  Mariano Navone |
| Champd: |  Karol Drzewiecki /  Petr Nouza |
The 2023 Poznań Open was a professional tennis tournament played on clay courts. It was the 19th edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place at the Park Tenisowy Olimpia in Poznań, Poland from 19 to 24 June 2023.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Alexander Shevchenko | 92 | 1 | ||
| Argentina | Federico Coria | 93 | 2 | |
| Czech Republic | 110 | 3 | ||
| Argentina | 115 | 4 | ||
| Tomás Barrios Vera | 161 | 5 | ||
 France | Geoffrey Blancaneaux | 166 | 6 | |
 Bosnia and Herzegovina | Damir Džumhur | 167 | 7 | |
| Czech Republic | Dalibor Svrčina | 192 | 8 |
The following players received wildcards into the singles main draw:
Dali Blanch
Leo Borg Maks KaśnikowskiThe following players received entry into the singles main draw as alternates:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
See main article: 2023 Poznań Open – Singles.
Mariano Navone def. Tomás Barrios Vera 7–5, 6–3.See main article: 2023 Poznań Open – Doubles.
Karol Drzewiecki / Petr Nouza def. Ariel Behar / Adam Pavlásek 7–6(7–2), 7–6(7–2).
