Asli Cakir Alptekin led a Turkish 1-2 when she held off Gamze Bulut to win the women's Olympic 1,500 metres gold after delivering a powerful final lap in a tactical, bunched race.

Alptekin, who won the European title in Helsinki two months ago, served a two-year ban for doping after testing positive in 2004.

She looked powerful and strong, coming home in four minutes, 10.23 with Bulut second in 4:10.40.

Maryam Yusuf Jamal of Bahrain was third and American Morgan Uceny, who fell in the 2011 world championship final, tumbled again on Friday and beat the track in tearful frustration.