The 2019 European Open was a men's tennis tournament played on indoor hard courts.

It was the fourth edition of the European Open and part of the ATP Tour 250 series of the 2019 ATP Tour.

It took place at the Lotto Arena in Antwerp, Belgium, from October 14 to October 20.

[1] The following players received wildcards into the singles main draw: The following players received entry using a protected ranking 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: