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] The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: The following pairs received wildcards into the doubles main draw: The following pair received entry as alternates: