2020 Calgary National Bank Challenger – Singles

Ivo Karlović was the defending champion but lost in the third round to Geoffrey Blancaneaux.

Arthur Rinderknech won the title after defeating Maxime Cressy 3–6, 7–6(7–5), 6–4 in the final.

Seeds
All seeds receive a bye into the second round. • # 🇨🇦 Vasek Pospisil (second round)

• # 🇯🇵 Go Soeda (second round)

• # Ivo Karlović (third round)

• # 🇯🇵 Tatsuma Ito (second round)

• # 🇨🇦 Brayden Schnur (third round)

• # 🇺🇸 Thai-Son Kwiatkowski (second round)

• # 🇬🇧 Liam Broady (semifinals)

• # 🇫🇷 Arthur Rinderknech (champion)

• # 🇩🇪 Julian Lenz (third round)

• # 🇺🇸 Maxime Cressy (final)

• # 🇩🇪 Tobias Kamke (quarterfinals)

• # 🇦🇺 Akira Santillan (second round)

• # 🇺🇸 JC Aragone (third round)

• # 🇫🇷 Geoffrey Blancaneaux (quarterfinals)

• # Gonçalo Oliveira (quarterfinals)

• # 🇫🇷 Manuel Guinard (second round)