In the men's 100m, Michael Frater (10.08) was third and Nesta Carter (10.10) behind winner Jaysuma Saidy Ndure of Norway who clocked 10.01. Chris Williams (20.91) and Ainsley Waugh (21.05) were third and fourth respectively in the 200m. The event was won in 20.08 by American LaShawn Merritt.

Olympic silver medallist, Danny McFarlane was pipped in the 400m hurdles by South African L.J. van Zyl. The winner clocked 49.03 with McFarlane just behind in 49.10.

National shot put champion Dorian Scott (20.58m) had to settle for fourth in the event won with a world-leading throw of 21.48m by American Reese Hoffa. Scott went into the meet as the world number one with a best of 21.45m.

It took less than 90 minutes for Allyson Felix to become the year's fastest woman in both the 100m and 400m.

The American ran inside eleven seconds for the first time and set a personal best of 10.93 in the 100m. She then outran all opponents with the same easy stride to take the 400m in 49.83, the first time a woman broke the 50-second mark this season.

"This is what I wanted to do, but I am tired," she said. "In the 100m, my start still needs to improve, but it is a lot better than it was."

In the 100m, Felix made the difference over the final 40m, dipping across the line to comfortably beat Sherone Simpson, 11.09. Sheri-Ann Brooks was third in 11.14.

In the 400m, Felix finished ahead of Shericka Williams, 50.50. Shereefa Lloyd (51.18) and Kaliese Spencer (51.48) were fourth and fifth respectively.

Chelsea Hammond was third in the long jump with 6.69m. Tatyana Kotova of Russia won with 6.83m.

American 110m hurdler David Oliver made sure he could not be counted out of the medal race in Beijing, winning in 12.95 seconds - just 0.07 off the world record set by China's Liu Xiang. Oliver's previous personal best was just 13.08. Oliver had ideal wind conditions to boost his time and make him the eighth best performer of all time.