After last night's opening ceremony, the action kicks off properly today and although Tour de France winner Chris Froome hasn't had much rest from the endurance race he's still hoping for a golden Olympic start as he goes for it in the cycling road race.
Swimming will also be starting, and the women's rugby sevens, plus Great Britain's women's hockey team take on Australia in a bid to turn their 2012 bronze medal into a gold.
Rio 2016, BBC1, 10.30pm
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