The 2021 BMW Open was a men's tennis tournament played on outdoor clay courts.

It was the 105th edition of the event and part of the ATP Tour 250 series of the 2021 ATP Tour.

It took place at the MTTC Iphitos complex in Munich, Germany, from 26 April until 2 May 2021.

[1] *per team The following players received wildcards into the main draw: The following players received entry as special exempt: The following players received entry from the qualifying draw: The following players received entry as lucky losers: The following pairs received wildcards into the doubles main draw: