The partnership between Tennis Canada and National Bank extends far beyond the National Bank Open. Since 2005, National Bank has been the title sponsor of the National Bank Challenger events organized by Tennis Canada. Formerly known as the National Bank Circuit, the Challenger events foster elite development and serve as a first experience on the professional tour for Canadian players, who can earn ATP/WTA and ITF points towards their world ranking. National Bank aims to support local players as they embark on the pro circuit by sponsoring Challenger events in Qu├ębec, in Manitoba and in Alberta and providing bursaries of up to $100,000. Through the years, the National Bank Challenger events have made a name for themselves and hosted players from around the world. In fact, many of the top names in tennis have played in National Bank Challenger events, including homegrown talents Denis Shapovalov, Milos Raonic,Vasek Pospisil, Felix Auger-Aliassime, Eugenie Bouchard and Bianca Andreescu.

The National Bank Challengers are the first levels of competition on the professional tours. It provides to next generation of players an opportunity to accumulate valuable world ranking points and move up the ranks, which in turn enables them to participate in bigger tournaments.