What to watch today: The final event of the first full day of track and field will be the men’s 10,000-meter final, including American hopefuls Grant Fisher and Newbury Park’s Nico Young, who could contend for medals. It’s a deep, talented field led by world record-holder Joshua Cheptegei of Uganda and Tokyo gold medalist Selemon Barego of Ethiopia. Track and field coverage begins at 10 a.m. on NBC, with the 10,000 scheduled for 12:20 p.m.

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