Olympic roundup

The U.S. men's boxing team is heading home with no Olympic medals for the first time.

Welterweight Errol Spence dropped a 16-11 decision to Russia's Andrey Zamkovoy in the quarterfinals Tuesday night.

Spence represented the last chance for the most successful team in Olympic boxing history to add to its record 108 medals. Instead, the Dallas-area fighter started slowly and never got going in his team's ninth loss in 10 fights.

U.S. women's boxers Marlen Esparza and Claressa Shields already have clinched medals in their sport's debut tournament, but the team is at its absolute nadir.

"I think the foundation is kind of crumbling a little bit, but we're going to rebuild it," U.S. assistant coach Charles Leverette said. "The support is there, but we have to figure out the best way to help these athletes get back to the top."

It was a family affair on the podium for the men's triathlon, with Alistair Brownlee taking the gold for Britain and younger brother Jonathan finishing third.

Alistair Brownlee pulled away from Javier Gomez of Spain halfway through the 10-kilometer run to finish in 1 hour, 46 minutes, 25 seconds. Gomez took silver, and Jonathan Brownlee secured the bronze despite serving a 15-second time penalty.

China's chance at a gold sweep of the diving events at the London Olympics ended when Ilya Zakharov of Russia nailed his final dive, scoring 104.50 points on it to win gold.

An emotionally spent Qin Kai of China took the silver and defending Olympic champion He Chong claimed the bronze. American Troy Dumais, competing in his fourth Olympic Games, placed fifth.

Dumais, who was the oldest athlete in the 12-diver final at age 32, leaves the Olympic stage for the last time. "I came here to have fun and I'm walking out of here having fun," he said.

Maggie Steffens scored four goals and the U.S. women's team topped Australia 11-9 in overtime, shaking off a potentially costly blunder by coach Adam Krikorian to reach the Olympic final.

In a bruising match between medal contenders, Australia's Southern Ash converted a penalty with one second left in regulation to tie it at 9 and force overtime. The officials awarded the penalty after Krikorian called a timeout without his team having possession of the ball.

• Brazil reached its first Olympic men's soccer final in 24 years when it beat South Korea behind two second-half goals by Leandro Damiao. The Brazilians will face Mexico, which beat Japan in the other semi.

•Italian kayaker Josefa Idem became the first woman to compete in eight Olympic Games -- and marked the occasion by upstaging a host of younger rivals to qualify for the flagship 500-meter K-1 final.