BAR429 LONDRES (REINO UNIDO) 28/07/2012.- El nadador estadounidense Michael Phelps tras conseguir el cuarto puesto en la final de los 400m estilos de los Juegos Olímpicos Londres 2012, en el Centro Acuático de Londres, Reino Unido, hoy sábado 28 de julio de 2012. EFE/BARBARA WALTON
China's Xue Chen (R) waits while teammate Zhang Xi serves at Centre Court of the stadium in Horse Guards Parade during their women's beach volleyball preliminary phase - Pool B match of the London 2012 Olympic Games against China's Xue Chen and Zhang Xi, on July 28, 2012 .Vasina-Vozakova won 18-21, 21-14, 16-14. AFP PHOTO / DANIEL GARCIA
North Korea's Chun Hwa Ryang competes on the women 48Kg Group A weightlifting competition at the London 2012 Olympic Games July 28, 2012. REUTERS/Adrees Latif (BRITAIN - Tags: SPORT OLYMPICS SPORT WEIGHTLIFTING)