Yohan Blake and fellow Jamaican Olympic champion Shelly-Ann Fraser-Pryce won the 100 metre sprints, while Kenya's David Rudisha scored a sensational victory in the 800 metres at Saturday's Diamond League meet.
Rudisha left the nine men far behind as he ran alone from the halfway point to win with a time of one minute 41.74 seconds for the fastest time ever registered in the United States and best time in the world this season.
"This is my first visit to the United States and I wanted to do something special," said Rudisha, who holds the world record of 1:41.01. "I was aiming for 1:42, so to run 1:41 was fantastic."
Rudisha's time was the ninth-fastest ever. Second place went to fellow Kenyan Alfred Kirwa Yego, nearly three seconds behind in 1:44.49.
World champion Blake overcame a slow start to overtake Trinidad's Keston Bledman and win the men's 100 in 9.90 seconds. Bledman clocked 9.93.
Former American world sprint champion, Tyson Gay, in his first race a year after undergoing hip surgery, won the 100 metres B race in 10.00 into a slight headwind as he strives to prepare for the US Olympic trials in Eugene, Oregon.
Paris: Newly-designed starting blocks to be used at the London Olympics will "enhance" the performance of athletes, according to the sport's world governing body, the IAAF, and not slow them down as claimed by Usain Bolt.
IAAF insisted that changes to the starting blocks, which athletes use in the 100m, 200m, 400m, 4x100m and 4x400m relays, as well as the 100, 110 and 400m hurdles, would not affect those using them. "Visually the starting blocks look very different," a spokesman said. "Actually they redesigned the starting blocks, but the changes have been introduced in order to enhance the measurement of the athlete's reaction times and to enhance the performance of the athletes."
Oz book London berth
Tokyo: Australia clinched the ticket to London Olympics as they outgunned China to take the top place among Asian teams at the men's volleyball qualifying tournament.