Four to watch
A quartet of Canada's best medal hopes
Mary Spencer of Wiarton, Ont., is a three-time world champion fighting out of the Windsor Boxing Club as women's boxing makes its Olympic debut.MARK BLINCH/Reuters
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Tara Whitten of Edmonton is a two-time world champion in omnium cycling.Andrew Brownbill/The Associated Press
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Paula Findlay of Edmonton dominated women's triathlon in 2011, and was the top-ranked female triathlete in the world.Kevin Van Paassen/The Globe and Mail
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Adam van Koeverden of Oakville, Ont., has two Olympic medals and won the 1,000-metre kayak world championship in 2011.LASZLO BALOGH/Reuters
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