Felix Sanchez of the Dominican Republic won the men's 400m hurdles Olympic title on Monday in a time of 47.63sec, taking a title he first won at the 2004 Athens Games.

The 34-year-old beat home American Michael Tinsley, who ran a personal best of 47.91sec, while the pre-race favourite Javier Culson of Puerto Rico took bronze in 48.10sec.

Great Britain's world champion Dai Greene finished fourth.