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Here's the five biggest things to watch from the Rio Olympics on Sunday. Click here for full TV schedule and more detailed information.
Women’s marathon
Mare Dibaba of Ethiopia is one of the favorites after winning the gold at last year’s world championships in Beijing. Amy Cragg, Shalane Flanagan and Desi Linden will represent the United States. And if you think your eyes are deceiving you, there are triplets in the race.
Leila, Lily and Liina Luik make up the women’s marathon team from Estonia.