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.
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:
The following pairs received wildcards into the doubles main draw:
All dates and times are CEST (UTC+2)