World-class international tennis stars and members of Canada’s Davis & Billie Jean King Cup Team competing in Calgary this November 5-12, 2023CALGARY, Alberta, Oct. 23, 2023 (GLOBE NEWSWIRE) Calgary National Bank Challenger Tournament (the “Challenger” or the “Tournament”) Director, Danny Da Costa announced a star-studded line-up today for the upcoming tournament taking place November 5 to 12, 2023 at the OSTEN & VICTOR Alberta Tennis Centre (ATC). 2022 Challenger singles champion, Dominik Ko