2020 European Open

The 2020 European Open was a men's tennis tournament played on indoor hard courts. It was the fifth edition of the European Open and part of the ATP Tour 250 series of the 2020 ATP Tour. It took place at the Lotto Arena in Antwerp, Belgium, from October 19 to October 25.

Seeds

 * Rankings are as of 12 October 2020.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇧🇪 Zizou Bergs
 * 🇧🇪 Kimmer Coppejans
 * 🇮🇹 Luca Nardi

The following players received entry from the qualifying draw:
 * 🇮🇹 Salvatore Caruso
 * 🇺🇸 Marcos Giron
 * Lloyd Harris
 * 🇫🇮 Emil Ruusuvuori

The following player received entry as a lucky loser:
 * 🇦🇷 Federico Coria

Withdrawals

 * Nikoloz Basilashvili → replaced by 🇫🇷 Richard Gasquet
 * 🇮🇹 Matteo Berrettini → replaced by Aljaž Bedene
 * 🇯🇵 Kei Nishikori → replaced by 🇦🇷 Federico Coria
 * 🇮🇹 Fabio Fognini → replaced by 🇪🇸 Feliciano López
 * Cristian Garín → replaced by 🇪🇸 Pablo Andújar
 * 🇷🇺 Andrey Rublev → replaced by 🇺🇸 Frances Tiafoe
 * 🇳🇴 Casper Ruud → replaced by 🇺🇸 Tommy Paul

Seeds

 * Rankings are as of 12 October 2020

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇧🇪 Michael Geerts / 🇧🇪 Yannick Mertens
 * 🇺🇸 Zane Khan / 🇮🇹 Luca Nardi

The following pairs received entry as an alternates:
 * 🇦🇺 Alex de Minaur / 🇦🇺 Matt Reid
 * 🇪🇸 Pablo Andújar / Sander Arends

Withdrawals

 * Before the tournament
 * 🇨🇴 Juan Sebastián Cabal
 * 🇯🇵 Kei Nishikori

Singles

 * 🇫🇷 Ugo Humbert def. 🇦🇺 Alex de Minaur, 6–1, 7–6(7–4)

Doubles

 * 🇦🇺 John Peers / 🇳🇿 Michael Venus def. 🇮🇳 Rohan Bopanna / Matwé Middelkoop, 6–3, 6–4