Latest news from the 15th day of competition at the Rio Olympics on Saturday (all times GMT): 0020 SEMENYA CANTERS TO VICTORY IN WOMEN'S 800M South Africa's Caster Semenya stormed to victory in the women's 800 metres final in a time of 1:55.28 seconds. Burundi's Francine Niyonsaba claimed the silver, while Kenya's Margaret Wambui took bronze. 0005 AMERICAN MATT CENTROWITZ WINS 1500M GOLD Matt Centrowitz took gold in the men's 1500 metres final, becoming the first American to win the event since 1908. More...