LONDON — Defending world champion Dawn Harper, fellow American Lolo Jones and world champion Sally Pearson cruised into the semifinals of the women’s 100-meter hurdles Monday, then found themselves trying to console a longtime rival.

Jones and Pearson won their respective heats, while Harper eased up near the line and finished second in hers. Pearson had the quickest time in the six heats, covering the distance in 12.57 seconds — the fastest first-round time in Olympic history.

Jamaica’s Brigitte Foster-Hylton, who had the second-fastest time in the world in women’s hurdles this season, failed to advance. She hit the fifth hurdle in her heat, veered toward the inside lane, got off stride and never recovered. She threw herself to the ground after crossing the finish line, slapped the track surface, let out a loud scream, started crying and then brushed aside Jones’ attempt to console her.

“The emotions were just outpouring from her,” said Jones, who was in the same heat as Foster-Hylton. “Even if she would have punched me, I totally would have understood.”

Pearson wrapped her arm around Foster-Hylton as she left the track, but that did little to stop the tears.

In other action:

Usain Bolt crossed the finish line and kept running. The world’s fastest man was ready to celebrate, and the guest list for the party included a delirious crowd at Olympic Stadium.

Bolt pulled away from a group of the world’s best sprinters and won the 100-meter dash in 9.63 seconds on Sunday night, joining Carl Lewis as the only men with consecutive gold medals in the marquee track and field event at the Summer Games.

World champion Yohan Blake, Bolt’s training partner and Jamaican countryman, won the silver in 9.75 seconds, and 2004 Olympic champion Justin Gatlin of the U.S. earned the bronze in 9.79 seconds. Everyone in the final broke 10 seconds except Asafa Powell of Jamaica, who pulled up with a groin injury.

“I executed, and that’s the key,” Bolt said. “I stopped worrying about the start. The end is what’s important.”

Andy Murray cruised past Roger Federer 6-2, 6-1, 6-4 in the men’s singles final at Wimbledon, then added a silver medal in mixed doubles. Ben Ainslie earned another gold in the Finn class to become the most successful sailor in Olympic history.

Murray avenged a loss to Federer in last month’s Wimbledon final while becoming the first British man to win the gold in singles since Josiah Ritchie in 1908.

“I’ve had a lot of tough losses in my career,” he said. “This is the best way to come back from the Wimbledon final. I’ll never forget it.”

The Olympics’ year of the woman hit another milestone when women’s boxing made its debut in the games Sunday. The tournament began with 12 entertaining bouts featuring uppercuts, haymakers and footwork that all measure up nicely to the men’s amateur sport.

Russia’s Elena Savelyeva won the first fight with a busy jab and strong combinations. U.S. lightweight Queen Underwood lost a close bout with Britain’s Natasha Jonas.

McKayla Maroney was all set to add the vault title to her team gymnastics gold with the U.S. when she made a costly mistake. She appeared to land her second vault on the backs of her heels. Her feet slid out from under her, and she plopped on the mat, a look of shock crossing her face.

“I really didn’t deserve to win a gold medal if I fall on my butt,” Maroney said. “I was still happy with a silver, but it’s still just sad.”

Tennis

Serena Williams added another Olympic title when she teamed with sister Venus to beat Andrea Hlavackova and Lucie Hradecka of the Czech Republic 6-4, 6-4 in the women’s doubles final.

Basketball

Diana Taurasi had 22 points and the U.S. women matched their Olympic scoring record in a 114-66 rout of China.

The Americans’ 38th consecutive victory in Olympic play gave them the top seed in the group for the quarterfinals. The U.S. will meet Canada on Tuesday.