Olympic champion Shelly-Ann Fraser of Jamaica exploded from the blocks and held off compatriot Kerron Stewart to win the world 100 metres gold in a time of 10.73 seconds, equalling the third fastest time in history.
American Carmelita Jeter snatched bronze but as in last year's Olympics, Jamaica have now won both blue-riband 100 metres sprint events, after Usain Bolt smashed the world record to win gold with 9.58 on Sunday.
Fraser burst into the lead with a perfect start and thwarted a late challenge from Beijing Games joint silver medallist Stewart, who ran a personal best 10.75.
Jeter, who was also third at the 2007 world championships, took the bronze in 10.90 ahead of holder Veronica Campbell-Brown of Jamaica.
Bolt, meanwhile, has turned his attention to the 200m but does not expect to set another world record.
The Jamaican shattered his own 100m world record - lowering it to 9.58 seconds - when winning gold on Sunday and next faces the 200m heats tomorrow when he will once again be the centre of attention.
However, he feels a repeat of Beijing - where he won gold and broke the world record - is not on the cards.
"I doubt I'm going to get the world record in the 200m," added Bolt, who collected a $100,000 bonus for his world record in the shorter sprint.
"I'm going to run hard, I think it's going to be even more difficult because I just took Tyson (Gay's) 100m title so I know he's going to come after me.
"I'm just going to do my best like I always do. You can always expect me to go out and run my heart out. It's going to be fun."
Defending champion Tyson Gay has withdrawn from the 200 metres because of a persistent groin injury.
The American, world champion and runner-up to Usain Bolt on Sunday, will not defend his title but does still hope to run in the 4x100 relay.
"The groin is too sore," his agent Mark Wetmore said.