Cameron Norrie had reached the final of the Los Cabos Open, which was his last competition.
Daniil Medvedev, Carlos Alcaraz and Stefanos Tsitsipas are some of the top ATP seeds in the competition.
The 2022 Canadian Open's opening round will feature Taylor Fritz, the 13th-ranked player in the world, taking on Andy Murray, the three-time Grand Slam champion.
The Canadian Open, also known as the National Bank Open presented by Rogers, is still one of the most prominent tennis tournaments.