2021 Challenger Biel/Bienne

The 2021 Challenger Biel/Bienne was a professional tennis tournament played on indoor hard courts. It was the 1st edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Biel/Bienne, Switzerland between 20 and 26 September 2021.

Seeds

 * 1 Rankings are as of 13 September 2021.

Other entrants
The following players received wildcards into the singles main draw:
 * Jérôme Kym
 * Leandro Riedi
 * Dominic Stricker

The following players received entry into the singles main draw as alternates:
 * 🇩🇪 Matthias Bachinger
 * 🇷🇺 Andrey Kuznetsov

The following players received entry from the qualifying draw:
 * 🇫🇷 Antoine Escoffier
 * 🇯🇵 Hiroki Moriya
 * Jakub Paul
 * 🇺🇸 Alexander Ritschard

The following player received entry as a lucky loser:
 * 🇷🇺 Alexander Shevchenko

Singles

 * 🇬🇧 Liam Broady def. Marc-Andrea Hüsler 7–5, 6–3.

Doubles

 * 🇧🇪 Ruben Bemelmans / 🇩🇪 Daniel Masur def. Marc-Andrea Hüsler /  Dominic Stricker Walkover.