The 2021 Challenger Eckental was a professional tennis tournament played on carpet courts. It was the 25th edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Eckental, Germany between 1 and 7 November 2021.
Singles main-draw entrants
Seeds
1 Rankings are as of 25 October 2021.
Other entrants
The following players received wildcards into the singles main draw: Marvin Möller Max Hans Rehberg Mats Rosenkranz
The following player received entry into the singles main draw using a protected ranking: Julian Lenz
The following players received entry from the qualifying draw: Johannes Härteis Christopher Heyman Tobias Simon Henri Squire
The following players received entry as lucky losers: Alexander Erler Lucas Miedler Aldin Šetkić
Champions
Singles
Daniel Masur def. Maxime Cressy 6–4, 6–4.
Doubles
Roman Jebavý / Jonny O'Mara def. Ruben Bemelmans / Daniel Masur 6–4, 7–5.