Rafaela Silva, who was brought up in Rio's notorious City of God favela, was called a "monkey" after being disqualified from the London Olympics in 2012. Four years on, Brazil is hosting the Games and the 57kg category judoka is the heroine as the country's first and only gold medal of the opening week of competition. "People taunted me, they said I was a monkey and my place was in a cage. But I proved my place is in sport and in judo," said the gritty 24-year-old who has spoken forcefully about racism in her country whilst she is in the Olympic headlines. Her sporting skill also deserves attention.