The 2021 European Open was a men's tennis tournament played on indoor hard courts. It was the sixth edition of the European Open and part of the ATP Tour 250 series of the 2021 ATP Tour. It took place at the Lotto Arena in Antwerp, Belgium, from 18 October until 24 October 2021.

Finals

Singles

Doubles

Singles main-draw entrants

Seeds

CountryPlayerRank1Seed
ITAJannik Sinner141
ARGDiego Schwartzman152
CHICristian Garín173
ESPRoberto Bautista Agut194
USAReilly Opelka205
AUSAlex de Minaur276
RSALloyd Harris317
SRBDušan Lajović358
  • Rankings are as of 4 October 2021.

Other entrants

The following players received wildcards into the singles main draw:

The following players received entry from the qualifying draw:

Withdrawals

Before the tournament

Doubles main-draw entrants

Seeds

CountryPlayerCountryPlayerRank1Seed
CROIvan DodigBRAMarcelo Melo331
FRANicolas MahutFRAFabrice Martin442
NEDWesley KoolhofNEDJean-Julien Rojer523
BELSander GilléBELJoran Vliegen734
  • Rankings are as of 4 October 2021.

Other entrants

The following pairs received wildcards into the doubles main draw:

Withdrawals

Before the tournament

During the tournament

External links