Caster Semenya has given South Africa its second gold medal at the 2016 Rio Olympics.
Semenya is the first South African woman in 64 years to win Olympic gold in athletics.
She ran a time of one minute - 55-point-28 seconds in the 800 metres final.
Semenya's victory brings South Africa's number of medals at the Rio Olympics to 10.
The race appears to have been an African affair with Burundi's Francine Niyonsaba finishing second with silver and Kenya's Margaret Wambui winning the bronze medal.
Semenya says the race wasn't easy.
Meanwhile, Caster's cousin Kgabo Sekgala says the athlete has made the family, country and the Limpopo province proud.
“It was very good so we thank God so therefor about this race so I think that medal is for South Africa is for Limpopo therefore is for Caster's friend and then we are very happy and so we just want to say so Caster God bless you so we are shinning we are shinning we are very happy as a family.”