Rory McIlroy is the defending champion from the last event in 2019.
Shane Lowry is one of the early starters today in Toronto as the Canadian Open returns to the PGA Tour for the first time since 2019.
The Clara man will play alongside Brandt Snedeker and Matt Fitzpatrick for the first two rounds, and starts just before 12.30pm Irish time today.
Rory McIlroy, the defending champion, tees off shortly after midday beside Justin Thomas and Corey Conners.
Meanwhile, the controversial Saudi-backed LIV Golf series gets underway in the UK later.
Phil Mickelson's among the star names in action at the Centurion Club near London, where there's a prize pot of £16m in the individual competition.
The Saudi-regime's been accused of using it as a form of 'sports washing', and former world number one Dustin Johnson's among the players who've turned their back on the established PGA Tour to focus on the new series.
Elsewhere, Ulster duo Jonathan Caldwell and Olivia Mehaffey are involved in the Volvo Scandinavian Mixed event, which gets underway in Halmstad today.
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