LONDON — After Ashton Eaton’s big first day in the Olympic decathlon, he was far more interested in sleep.
And with good reason.
His day began Wednesday by breaking Bill Toomey’s 44-year-old Olympic record in the decathlon 100-meter dash, finishing in 10.35 seconds. He ended it with a solid performance in the 400, bursting across the line in 46.90. In between, Eaton was first in the long jump, 11th in the shot put and second in the high jump.
But he didn’t stay around long to chat about medals or world-record possibilities. He was off in a hurry.
“Gotta go,” he said after the evening session. “Early morning.”
The American put himself in position not only to break the Olympic record, but to give himself an outside chance at topping his own world mark.
After five events, Eaton has a 220-point advantage over fellow American Trey Hardee.
TRACK AND FIELD: Usain Bolt won his 200-meter semifinal heat in 20.18 seconds, moving closer to becoming the first man with two Olympic golds in the 200 meters.
The 200 final will include Bolt’s teammate and training partner, 100 silver medalist Yohan Blake, who won the first heat in 20.01.
Wallace Spearmon, of the U.S., was second in 20.02, with Christophe Lemaitre, of France, next in 20.03 to also advance.
• Brittney Reese won the long jump, becoming only the second U.S. woman to win the event at the Olympics.
The two-time world champion went into the competition with the best jump of the season and put down the best mark in the final with 7.12 meters on her second attempt. She is first U.S. woman to win the long jump since Jackie Joyner-Kersee.
• Aries Merritt led a 1-2 finish for the United States in the 110-meter hurdles, winning in 12.92 seconds. Defending champion Dayron Robles, of Cuba, pulled up midway through and clutched his right hamstring.
Jason Richardson, the world champion, was second in 13.04.
• Lashinda Demus, of the U.S., won silver medal in the 400 meters hurdles.
Demus, last year’s world champion, pushed hard at the end but came up just short in her attempt to catch Natalya Antyukh, of Russia.
VOLLEYBALL: The U.S. men got off to a strong start, but they are headed home without a medal. The defending Olympic champion lost 28-26, 25-20, 25-20 to Italy in the quarterfinals.
SAILING: The U.S. was shut out of Olympic sailing medals for the first time since 1936 when women’s match racing skipper Anna Tunnicliffe was beaten in the quarterfinals by Finland.
BOXING: Middleweight Claressa Shields dominated Kazakhstan’s Marina Volnova in the semifinals of the first Olympic women’s tournament, earning a spot in the title bout against Russia’s Nadezda Torlopova.
Shields is the last American boxer left.
WATER POLO: The U.S. men’s team was eliminated with an 8-2 quarterfinal loss to unbeaten Croatia.
WRESTLING: Clarissa Chun, of the U.S., won bronze in the 48-kilogram category, giving the U.S. its first wrestling medal of the games.
DIVING: China’s Chen Ruolin led the women’s 10-meter platform preliminaries, with the teenager trying to add a gold medal in the individual event to the one she won in platform synchro.
Chen totaled 392.35 points during five rounds. She is the defending champion in the individual event, and won both 10-meter titles four years ago in Beijing when she was 15.
China has won five of six diving golds so far in London, including the women’s 10-meter synchronized title taken by Chen and Wang Hao. The country’s attempt to sweep all eight golds was spoiled when Ilya Zakharov of Russia won the men’s 3-meter springboard Tuesday.
ELSEWHERE IN LONDON: Argentina will meet the Netherlands in the women’s field hockey final. Argentina advanced with a 2-1 victory over Britain, and the Dutch topped New Zealand 3-1 in a penalty shootout after the teams were tied at 2 at the end of regulation. ... The semifinals are set for men’s handball, with Hungary slated to face Sweden and France to take on Croatia on Friday. ... Steve Guerdat of Switzerland, riding Nino des Buissonnets, won the gold for individual show jumping. Gerco Schroder of the Netherlands, riding London, beat Cian O’Connor of Ireland, on Blue Loyd 12, in a jump-off for silver. ... China completed a sweep of all four Olympic table tennis titles with a 3-0 victory over South Korea in the men’s team final. China has won 24 of 28 gold medals since the sport entered the Olympic program in 1988. ... Taekwondo golds were awarded to China’s Wu Jingyu (women’s 49-kg) and Spain’s Joel Gonzalez (men’s 58-kg).