| Date: | 15–23 July |
| Edition: | 14th |
| Draw: | 32S/32Q/16D |
| Prize Money: | €64,000+H |
| Surface: | Clay |
| Location: | Poznań, Poland |
| Venue: | Park Tenisowy Olimpia |
| Champs: |  Alexey Vatutin |
| Champd: |  Guido Andreozzi /  Jaume Munar |
The 2017 Poznań Open is a professional tennis tournament played on clay courts. It is the fourteenth edition of the tournament which is part of the 2017 ATP Challenger Tour. It takes place at the Park Tenisowy Olimpia in Poznań, Poland from 15 to 23 July 2017, including the qualifying competition in the first two days.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Norway | Casper Ruud | 111 | 1 | |
| Florian Mayer | 114 | 2 | ||
 Czech Republic | Adam Pavlásek | 136 | 3 | |
 Poland | Jerzy Janowicz | 141 | 4 | |
| Czech Republic | Jan Šátral | 142 | 5 | |
| Argentina | Guido Andreozzi | 157 | 6 | |
| Spain | 172 | 7 | ||
| Czech Republic | Lukáš Rosol | 215 | 8 |
The following players received wildcards into the singles main draw:
Victor Vlad Cornea Michał Dembek Hubert Hurkacz Andriej KapaśThe following players received entry from the qualifying draw:
Danylo Kalenichenko Mariano Kestelboim
Jonathan Mridha Maciej RajskiSee main article: 2017 Poznań Open – Singles.
Alexey Vatutin def. Guido Andreozzi 2–6, 7–6(12–10), 6–3.See main article: 2017 Poznań Open – Doubles.
Guido Andreozzi / Jaume Munar def. Tomasz Bednarek / Gonçalo Oliveira 6–7(4–7), 6–3, [10–4].