2021 Open de Rennes
The 2021 Open Blot Rennes was a professional tennis tournament played on hard courts. It was the fifteenth edition of the tournament and part of the 2021 [ATP Challenger Tour]. It took place in Rennes, France between 13 and 19 September 2021.
Singles main-draw entrants
Seeds
Other entrants
The following players received wildcards into the singles main draw:The following player received entry into the singles main draw as an alternate:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Champions
Singles
- Benjamin Bonzi def. Mats Moraing 7–6, 7–6.
Doubles
- Bart Stevens / Tim van Rijthoven def. Marek Gengel / Tomáš Macháč 6–7, 7–5, .