LONDON: Jamaica's Shelly-Ann Fraser-Pryce proved to be the sprint queen of the track once again when she retained her Olympic 100 metres title yesterday.

Fraser-Pryce, securing what could be the first leg of a Jamaican double with Usain Bolt and Yohan Blake vying for men's 100 gold today, clocked 10.75 seconds to cap a frantic night of action in a packed Olympic stadium.

American Carmelita Jeter grabbed silver in 10.78 and Veronica Campbell-Brown of Jamaica claimed bronze in 10.81.

American Gail Devers was the last to retain the 100 title when following up Barcelona triumph with victory in Atlanta in 1996.

It was a glorious night for Britain as the host nation won three Olympic golds in track and field in about one hour last night. The noise in the stadium was deafening as the crowd of 80,000, which included members of the royal family, roared and celebrated.

First, Britain's Jessica Ennis won the heptathlon Olympic gold yesterday, capping seven events over two days by running the last stretch. Then - unexpectedly - the hosts got a second medal when Greg Rutherford won the long jump, and Mo Farah followed, taking the 10,000 metres.

It was a day where history was made in more than one Olympic sport.

Michael Phelps took an unprecedented 18th Olympic gold medal on the last day of his remarkable career, while Oscar Pistorius, the 'Blade Runner,' became the first amputee to compete in track at the Olympics. Pistorius was cheered around the track, finishing second in his 400-metre heat to advance to the next round on his carbon fiber blades.

The South African double amputee circled the oval with fans cheering him on in 45.44 seconds - good enough for second place in his heat and a berth in the semi-finals tonight.

While Pistorius made history, Usain Bolt made a stuttering debut, overcoming a slow start to advance to the 100-metre semi-finals.

In a night that featured the long and short of swimming, Ranomi Kromowidjojo of the Netherlands won the women's 50 freestyle to complete a sweep of the sprints.

In tennis, Serena Williams clinched her first Olympic gold medal in singles on the same Centre Court at Wimbledon, one month after winning her 14th Grand Slam title. Williams fired an ace on match point to complete an easy 6-0, 6-1 win over Maria Sharapova.