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]
Nikoloz Basilashvili def. 
Jan-Lennard Struff, 6–4, 7–6(7–5)
Wesley Koolhof / Kevin Krawietz def. .svg/1280px-Flag_of_Belgium_(civil).svg.png){kind=small}
Sander Gillé / Joran Vliegen, 4–6, 6–4, [10–5]*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:
Dan Evans → replaced by 
Egor Gerasimov
Márton Fucsovics → replaced by 
Ričardas Berankis
Hubert Hurkacz → replaced by 
Thiago Monteiro
Aslan Karatsev → replaced by 
Norbert Gombos
Yoshihito Nishioka → replaced by 
Pablo Cuevas
Jannik Sinner → replaced by 
Sebastian Korda Lorenzo Sonego → replaced by .svg/1280px-Flag_of_Australia_(converted).svg.png){kind=small}
Alexei Popyrin Stefano Travaglia → replaced by Andrej Martin
Jiří Veselý → replaced by 
Federico CoriaThe following pairs received wildcards into the doubles main draw:
Wesley Koolhof / Łukasz Kubot → replaced by 
Andrey Golubev / Andrea Vavassori Kevin Krawietz / 
Horia Tecău → replaced by Yannick Hanfmann / Dominik Koepfer Marcelo Melo / Jean-Julien Rojer → replaced by 
Harri Heliövaara / Emil Ruusuvuori Rajeev Ram / Joe Salisbury → replaced by Wesley Koolhof / Kevin Krawietz Ken Skupski / Neal Skupski → replaced by 
Jonathan Erlich / 
Divij Sharan
