| Date: | 16–22 October |
| Edition: | 8th |
| Category: | ATP Tour 250 Series |
| Prize Money: | €673,630 |
| Draw: | 28S / 16D |
| Surface: | Hard (indoor) |
| Location: | Antwerp, Belgium |
| Venue: | Lotto Arena |
| Champs: |  Alexander Bublik |
| Champd: | Petros Tsitsipas / Stefanos Tsitsipas |
| Main Name: | European Open (tennis) European Open |
The 2023 European Open is a men's tennis tournament currently played on indoor hard courts. It is the eighth edition of the European Open and part of the ATP Tour 250 series of the 2023 ATP Tour. It takes place at the Lotto Arena in Antwerp, Belgium, from 16 October until 22 October 2023.[1]
See main article: 2023 European Open – Singles.
Alexander Bublik def. 
Arthur Fils, 6–4, 6–4See main article: 2023 European Open – Doubles.
Adam Pavlásek, 6–7(5–7), 6–4, [10–8]| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Stefanos Tsitsipas | 6 | 1 | ||
| Jan-Lennard Struff | 27 | 2 | ||
| Kazakhstan | Alexander Bublik | 35 | 3 | |
| France | Arthur Fils | 44 | 4 | |
| Yannick Hanfmann | 53 | 5 | ||
 Spain | Roberto Carballés Baena | 61 | 6 | |
| France | Richard Gasquet | 63 | 7 | |
 Peru | Juan Pablo Varillas | 65 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Matteo Arnaldi → replaced by Alexander Shevchenko Jaume Munar Hugo Gaston Ugo Humbert → replaced by Nuno Borges
Sebastian Korda → replaced by 
Fábián Marozsán Jannik Sinner → replaced by Dominic Stricker Luca Van Assche → replaced by Dominik Koepfer| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
 Mexico | Santiago González | France | Édouard Roger-Vasselin | 22 | 1 | |
| Kevin Krawietz | Tim Pütz | 40 | 2 | |||
 United Kingdom | Lloyd Glasspool | Hugo Nys | 55 | 3 | ||
| Matwé Middelkoop | Andreas Mies | 72 | 4 |
The following pairs received wildcards into the doubles main draw:
The following pair received entry as alternates:
Quentin Halys → replaced by 
Victor Vlad Cornea / Petr Nouza Roberto Carballés Baena / Bernabé Zapata Miralles → replaced by Roberto Carballés Baena / Jaume Munar Lloyd Glasspool / Nicolas Mahut → replaced by Lloyd Glasspool / Hugo Nys
