The 2020 Erste Bank Open was a men's tennis tournament played on indoor hard courts. It was the 46th edition of the event, and part of the ATP Tour 500 Series of the 2020 ATP Tour. It was held at the Wiener Stadthalle in Vienna, Austria, from 26 October until 1November 2020.
| 2020 Erste Bank Open | |
|---|---|
| Date | 26 October – 1 November |
| Edition | 46th |
| Category | ATP Tour 500 Series |
| Draw | 32S / 16D |
| Prize money | €1,409,510 |
| Surface | Hard |
| Location | Vienna, Austria |
| Venue | Wiener Stadthalle |
| Champions | |
| Singles | |
 Andrey Rublev[1] | |
| Doubles | |
 Łukasz Kubot /  Marcelo Melo[2] | |
One seed Andrey Rublev won the singles title.[3]
Singles main-draw entrants
Seeds
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 SRB | Novak Djokovic | 1 | 1 |
 AUT | Dominic Thiem | 3 | 2 |
 GRE | Stefanos Tsitsipas | 5 | 3 |
| RUS | Daniil Medvedev | 6 | 4 |
| RUS | Andrey Rublev | 8 | 5 |
 ARG | |||
 FRA | Gaël Monfils | 11 | 7 |
 CAN | Denis Shapovalov | 12 | 8 |
- Rankings are as of 19 October 2020
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 using a protected ranking into the singles main draw:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Withdrawals
Matteo Berrettini → replaced by 
Taylor Fritz- Fabio Fognini → replaced by
Filip Krajinović 
David Goffin → replaced by 
Jan-Lennard Struff- John Isner → replaced by
Jason Jung 
Kei Nishikori → replaced by 
Vitaliy Sachko
Milos Raonic → replaced by 
Hubert Hurkacz
Diego Schwartzman → replaced by Lorenzo Sonego
Doubles main-draw entrants
Seeds
| Country | Player | Country | Player | Rank1 | Seed |
|---|---|---|---|---|---|
 CRO | Mate Pavić | BRA | Bruno Soares | 11 | 1 |
 USA | Rajeev Ram |  GBR | Joe Salisbury | 16 | 2 |
| POL | Łukasz Kubot | BRA | Marcelo Melo | 24 | 3 |
| FRA | Pierre-Hugues Herbert | FRA | Nicolas Mahut | 25 | 4 |
- Rankings are as of 19 October 2020
Other entrants
The following pairs received wildcards into the doubles main draw:
The following pair received entry from the qualifying draw:
Finals
Singles
Andrey Rublev def. Lorenzo Sonego, 6–4, 6–4
Doubles
- Łukasz Kubot /
Marcelo Melo def. 
Jamie Murray / Neal Skupski, 7–6(7–5), 7–5