The World Athletics Championships begin this Saturday in Tokyo — Friday in Canadian time zones. Here's a look at the top Canadians, including an unprecedented four defending world champs , in action at the biggest track and field meet of the year.

In 2022, Rogers became the first Canadian to win a hammer-throw medal at the world championships. A year later, she upgraded from silver to gold as she and Katzberg captured Canada's first world titles in the sport. They made more Canadian hammer history last summer in Paris, winning the country's first Olympic golds while snapping a 112-year medal drought.

Rogers, 26, is the clear favourite to repeat as women's world champion after winning eight of her nine international starts this year, including the last six in a row. Katzberg, 23, opene

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