2021 Challenger Biel/Bienne – Singles

This was the first edition of the tournament.

Liam Broady won the title after defeating Marc-Andrea Hüsler 7–5, 6–3 in the final.

Seeds
• # 🇫🇷 Pierre-Hugues Herbert (withdrew)

• # Henri Laaksonen (second round)

• # 🇦🇹 Dennis Novak (second round)

• # 🇨🇿 Tomáš Macháč (first round)

• # 🇬🇧 Liam Broady (champion)

• # João Sousa (quarterfinals)

• # Marc-Andrea Hüsler (final)

• # 🇹🇷 Cem İlkel (second round)