- Source: 2021 Open Quimper Bretagne II
The 2021 Open Quimper Bretagne II was a professional tennis tournament played on hard courts. It was the twelfth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Quimper, France between 1 and 7 February 2021.
Singles main-draw entrants
= Seeds
=1 Rankings as of 25 January 2021.
= Other entrants
=The following players received wildcards into the singles main draw:
Arthur Cazaux
Antoine Cornut-Chauvinc
Manuel Guinard
The following players received entry into the singles main draw as alternates:
Maxime Janvier
Lukáš Lacko
The following players received entry from the qualifying draw:
Mathias Bourgue
Evan Furness
Tobias Kamke
Matteo Viola
The following player received entry as a lucky loser:
Daniel Masur
Champions
= Singles
=Brandon Nakashima def. Bernabé Zapata Miralles 6–3, 6–4.
= Doubles
=Ruben Bemelmans / Daniel Masur def. Brandon Nakashima / Hunter Reese 6–2, 6–1.