2021 Wolffkran Open

The 2021 Wolffkran Open was a professional tennis tournament played on carpet courts. It was the fifth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Ismaning, Germany between 25 and 31 October 2021.

Seeds

 * 1 Rankings are as of 18 October 2021.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇩🇪 Max Hans Rehberg
 * 🇩🇪 Mats Rosenkranz
 * 🇩🇪 Henri Squire

The following player received entry into the singles main draw using a protected ranking:
 * 🇩🇪 Yannick Maden

The following players received entry into the singles main draw as alternates:
 * 🇩🇪 Tobias Kamke
 * 🇺🇦 Vitaliy Sachko

The following players received entry from the qualifying draw:
 * 🇩🇪 Matthias Bachinger
 * 🇨🇿 Jonáš Forejtek
 * 🇩🇪 Julian Lenz
 * 🇫🇮 Otto Virtanen

The following player received entry as a lucky loser:
 * 🇯🇵 Hiroki Moriya

Singles

 * 🇩🇪 Oscar Otte def. 🇸🇰 Lukáš Lacko 6–4, 6–4.

Doubles

 * 🇩🇪 Andre Begemann / 🇸🇰 Igor Zelenay def. 🇨🇿 Marek Gengel / 🇨🇿 Tomáš Macháč 6–2, 6–4.