The 2020 Calgary National Bank Challenger was a professional tennis tournament played on indoor hard courts. It was the second edition of the tournament and part of the 2020 ATP Challenger Tour. It took place in Calgary, Canada.

Singles entrants Seeds Country Player Rank1 SeedVasek Pospisil981Go Soeda1142Ivo Karlović1233Tatsuma Ito1524Brayden Schnur1785Thai-Son Kwiatkowski1826Liam Broady2287Arthur Rinderknech2398Julian Lenz2459Maxime Cressy25210Tobias Kamke25411Akira Santillan25812JC Aragone26713Geoffrey Blancaneaux27014Gonçalo Oliveira27815Manuel Guinard30016 1 Rankings are as of 17 February 2020.

Other entrants The following players received wildcards into the singles main draw: Taha Baadi Gabriel Diallo Alexis Galarneau Cleeve Harper Joshua Peck

The following player received entry into the singles main draw using a protected ranking: Blake Mott

The following players received entry from the qualifying draw: Felix Corwin Alex Rybakov

The following players received entry as lucky losers: Harri Heliövaara Dennis Novikov

Champions Singles

Arthur Rinderknech def. Maxime Cressy 3–6, 7–6(7–5), 6–4.

Doubles

Nathan Pasha / Max Schnur def. Harry Bourchier / Filip Peliwo 7–6(7–4), 6–3.

References