| Date: | 3–9 June |
| Edition: | 16th |
| Surface: | Clay |
| Location: | Poznań, Poland |
| Venue: | Park Tenisowy Olimpia |
| Champs: |  Tommy Robredo |
| Champd: |  Andrea Vavassori / David Vega Hernández |
| After Year: | 2021 |
The 2019 Poznań Open was a professional tennis tournament played on clay courts. It was the sixteenth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place at the Park Tenisowy Olimpia in Poznań, Poland from 3 to 9 June 2019.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Poland | Hubert Hurkacz | 44 | 1 | |
| Spain | Roberto Carballés Baena | 76 | 2 | |
 Austria | 113 | 3 | ||
 Sweden | 115 | 4 | ||
| 124 | 5 | |||
| Spain | 134 | 6 | ||
| Austria | Sebastian Ofner | 140 | 7 | |
| Italy | Gianluca Mager | 142 | 8 | |
| Oscar Otte | 144 | 9 | ||
 France | Quentin Halys | 151 | 10 | |
| João Domingues | 160 | 11 | ||
| Italy | Filippo Baldi | 163 | 12 | |
| Italy | Alessandro Giannessi | 164 | 13 | |
| Spain | Enrique López Pérez | 166 | 14 | |
| Rudolf Molleker | 173 | 15 | ||
| Blaž Rola | 183 | 16 |
The following players received wildcards into the singles main draw:
Michał Dembek Hubert Hurkacz Wojciech Marek Daniel Michalski Kacper ŻukThe following player received entry into the singles main draw using a protected ranking:
The following players received entry into the singles main draw using their ITF World Tennis Ranking:
Sekou Bangoura Javier Barranco Cosano Raúl Brancaccio
Christopher Heyman Pietro RondoniThe following players received entry from the qualifying draw:
See main article: 2019 Poznań Open – Singles.
Tommy Robredo def. Rudolf Molleker 5–7, 6–4, 6–1.See main article: 2019 Poznań Open – Doubles.
Andrea Vavassori / David Vega Hernández def. Pedro Martínez / Mark Vervoort 6–4, 6–7(4–7), [10–6].