Usain Bolt and Andy Murray delivered stunning performances Sunday, as they and others secured their places in the annals of London 2012 Olympic Games.

In track and field, Bolt once again dominated his competition. The Jamaican runner broke ahead of the pack in the men's 100-meter dash to win the gold medal. His time, 9.63 seconds, is the second fastest time ever recorded in the event.

The world record that Bolt came so close to beating? Also held by Bolt, who covered the 100-meter distance in a time of 9.58 seconds in 2009.

Oscar Pistorius, the South African double-amputee runner who relies on prosthetic legs, captured the hearts of spectators, but he failed to place in the 400-meter semifinals. Although Pistorius finished last in his semifinal, his previous performance at these games speaks volumes about his athletic spirit.

"The whole experience is mind-blowing," Pistorius told the New York Times. "My aim was to make the semifinal. It's a dream come true."

The Blade Runner isn't out of the Olympics yet: Pistorius will compete in the 4X400-meter relay Thursday.

In tennis, the American siblings Serena and Venus Williams won the gold medal in the women's doubles competition, beating a Czech team, 6-4, 6-4. A Russian team took the bronze medal.

On the men's side, Britain's Andy Murray won the gold medal for his singles performance. Murray, who was reduced to tears after a defeat in Wimbleton four weeks ago at the hands of Switzerland's Roger Federer, ultimately fond the strength to beat the same athlete in their much-hyped rematch.

Murray claimed the British team's rousing success at the Olympics and a supportive home-field crowd propelled him to take home the gold.

American beach volleyball sensations Misty May-Treanor and Kerri Walsh racked up another win on Sunday, this time against Italy's Greta Cicolari and Marta Menegatti.

Walsh and May-Treanor have yet to be defeated in London, and the pair took home the gold in both Athens (2004) and Beijing (2008). They are heavily favored in this year's finals.