Carlin Isles (USA) of USA runs in for a try on 11 August in Rio
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Carlin Isles: My journey from homelessness to Rio

The USA's Carlin Isles was the top try scorer at the 2016 Olympic Games in the rugby seven's tournament. He was homeless before the age of six, his mother went to prison and he and his twin sister were put into foster care.

They were adopted aged eight and Isles started playing sports and running track.

He ran 100m in 10.15 seconds but four years ago decided to switch to rugby, even though he had never played the sport before.

He is now known as 'the fastest man in rugby'.