Ronnie Baker sprinted to a second men's 100m triumph in less than a week, winning the Rome Diamond League meet as US rival Christian Coleman faded to fourth.
A late acceleration saw the US 60m indoor champion power to a new personal and season best 9.93sec with France's Jimmy Vicaut second in 10.02 and Italy's Filippo Tortu snatching third place in 10.04 yesterday.
Coleman, the world silver medallist, complained of a leg problem and pulled up towards the end.
"Today was definitely a confidence booster, to have two wins in two races under my belt is great but I know I have to keep working hard," said Baker.
Baker had beaten Coleman last Sunday with a wind-aided 9.78 in Eugene as the battle heats up for men's 100m supremacy in the post-Usain Bolt era.
"Every race is anybody's race, it's never a definite between myself and Christian," said 24-year-old Baker.
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"I was third here last year so to win is super exciting, to run a personal is amazing for me.
"It's really exciting that things are starting to click together.
"My next race is the US champs in two weeks. I always feel nervous with these huge crowds but I hope to make and win the Diamond League final."
- 'Bad luck day' -
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"Had I not fallen I would have won," said Coburn who trailed in fourth. "It was just a back luck day."