The 2020 Bett1Hulks Indoors was an ATP tournament organized for male professional tennis players, held in Cologne, Germany, in mid-October 2020 on indoor hard courts. It was primarily organized due to the cancellation of many tournaments during the 2020 season due to the COVID-19 pandemic. It was the first and only edition of the tournament and took place at the Lanxess Arena in Cologne, Germany, from October 12 through 18, 2020.[1]
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Alexander Zverev | 7 | 1 | ||
 Spain | Roberto Bautista Agut | 10 | 2 | |
 Canada | Félix Auger-Aliassime | 22 | 3 | |
 France | Benoît Paire | 26 | 4 | |
 Serbia | Filip Krajinović | 29 | 5 | |
 Poland | Hubert Hurkacz | 31 | 6 | |
| Jan-Lennard Struff | 32 | 7 | ||
| Marin Čilić | 40 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following players received entry as a lucky loser:
Marc Polmans
Marcos Giron Gaël Monfils → replaced by 
Dennis Novak
Yoshihito Nishioka → replaced by Alejandro Davidovich Fokina| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Poland | Łukasz Kubot |  Brazil | Marcelo Melo | 18 | 1 | |
| France | Pierre-Hugues Herbert | France | Nicolas Mahut | 28 | 2 | |
| Raven Klaasen | Austria | Oliver Marach | 39 | 3 | ||
 Mexico | Santiago González |  United Kingdom | Ken Skupski | 98 | 4 |
The following pairs received wildcards into the doubles main draw:
All dates and times are CEST (UTC+2)
See main article: 2020 Bett1Hulks Indoors – Singles.
Félix Auger-Aliassime, 6–3, 6–3See main article: 2020 Bett1Hulks Indoors – Doubles.
Pierre-Hugues Herbert / Nicolas Mahut def. Łukasz Kubot / Marcelo Melo, 6–4, 6–4