Ethiopia's Tirunesh Dibaba produced her devastating trademark kick 600m from the line to successfully defend her Olympic women's 10 000m title. Gold medalist Tirunesh Dibaba of Ethiopia celebrates with Werknesh Kidane (L) and Beleynesh Oljira (R) of Ethiopia after the women's 10 000m final. Michael Phelps won the men's 100m butterfly, claiming the title for the third straight Games for the 17th gold medal of his Olympic career. South Arican Chad le Clos and Russian Evgeny Korotyshkin shared the silver medal. Chad le Cos of South Africa looks on after finishing second in the men's 100m butterfly final. Chad le Cos of South Africa congratulates Michael Phelps of America on winning the men's 100m butterfly final. Trudi Maree of South Africa dives off the starting blocks in the Women's 50m freestyle heat 7. Maree finished eighth in her 50m heat in 25.78. South Africa had a disappointing morning on the seventh day of competition at the London Games. LJ Van Zyl faded in the finishing straight to cross the line sixth in his heat in the 400m hurdles. South Africa's 400m hurdler Cornel Fredericks was knocked out in the first round. Fredericks looked flat from the start and trailed home in eighth pace in his heat in 52.29. Justin Reid-Ross of South Africa celebrates after scoring during the men's Hockey match between South Africa and Spain at the Riverbank Arena. Spain beat South Africa 3-2. Christine Day of Jamaica and Amantle Montsho of Botswana compete in the women's 400m Heats at the Olympic Stadium. Murielle Ahoure of Cote d'Ivoire competes in the Women's 100m Round 1 Heats. Ahoure qualified for the semifinals in a time of 10.99, a new national record. Blessing Okagbare of Nigeria competes in the women's 100m Round 1 Heats. Okagbare won her heat with a time of in 10.93, a personal best time, to go through to the semifinals.