What to watch this weekend: McIntosh's drive for 5 and other key races

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Today, we'll look ahead to the key races remaining at the swim world championships, including Summer McIntosh's drive for five gold medals and an all-Canadian showdown. Plus, a pair of intriguing Canada-U.S. matchups are on deck at the National Bank Open.

McIntosh's path to five, and other key duels at swim worlds

It was a quiet day in the pool for Canada at the world championships in Singapore. The weekend, however, could get quite noisy.

Friday's top result was a fourth-place finish for Blake Tierney in the 200-metre backstroke — an excellent showing for the 23-year-old, who did not even advance through heats at last summer's Paris Olympics. Tierney also broke the Canadian record, then did it again, in heats and semis on Thursday.

Canada may win as many as three solo medals on Saturday at the swimming world championships. And Sunday could be a coronation.

Here are the three key duels to watch:

Josh Liendo vs. Ilya Kharun in the men's 100 butterfly, Saturday, 7:53 a.m. ET

A friendly (of course) Canadian rivalry is budding between Liendo and Kharun, who both won medals in this event at last year's Olympics, with Liendo taking silver and Kharun grabbing bronze. Now, gold medallist Kristof Milak is out of the picture — and the top step of the podium appears up for grabs.

For Liendo, even after snagging bronze as part of the 4x100 mixed medley relay team, the entire meet is down to this one event. He failed to advance through the 50 freestyle heats on Friday, then told CBC Sports reporter Devin Heroux that he's "all in" on the 100 fly. The 22-year-old owns the Canadian