North and South America
Bermuda – Flora Duffy (Triathlon)
Bermuda is the smallest country to have won a medal at the Summer Games, but Duffy, who is leading the triathlon world rankings, has a strong chance of giving it another one.
Canada – Rosie MacLennan (Trampolining)
The emergence of Canada as a trampolining power might have been rather unexpected but its women have won a medal at every Olympics. MacLennan is defending her title.
Jamaica – Alia Atkinson (Swimming)
There will be a lot of attention on Jamaica’s sprinters but history also beckons in the pool, where breaststroker Atkinson will be seeking the island’s first Olympic medal.
United States – Kerri Walsh Jennings (Beach Volleyball)
Walsh Jennings has already won three gold medals with Misty May-Treanor but she now has a new partner in April Ross, and will be going for an unprecedented fourth.
Brazil – Men’s Volleyball Team
Men’s volleyball will be one of the final gold medals awarded. Brazil, where the sport is huge, has lost the last two finals, and will be hoping for the perfect climax to the Games.
Colombia – Fernando Gaviria (Cycling)
Colombia loves cycling but it has never won Olympic track gold, something which world omnium champion, Gaviria, is aiming to put right. He beat Mark Cavendish twice on the road in 2015, and will face him again, in what promises to be one of the best duels in Rio.