2021 Erste Bank Open


The 2021 Erste Bank Open was a men's tennis tournament played on indoor hard courts. It was the 47th edition of the event, and part of the ATP Tour 500 Series of the 2021 ATP Tour. It was held at the Wiener Stadthalle in Vienna, Austria, from 25 until 31 October 2021. Second-seeded Alexander Zverev won the singles title.

Finals

Singles

Alexander Zverev def. Frances Tiafoe, 7–5, 6–4

Doubles

Juan Sebastián Cabal / Robert Farah def. Rajeev Ram / Joe Salisbury, 6–4, 6–2

Singles main-draw entrants

Seeds

Other entrants

The following players received wildcards into the singles main draw:
The following player received entry using a special exempt:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:

Withdrawals

;Before the tournament

Doubles main-draw entrants

Seeds

Other entrants

The following pairs received wildcards into the doubles main draw:
The following pair received entry from the qualifying draw:
The following pair received entry as lucky losers:

Withdrawals

;Before the tournament