Sixteen-year-old US high school student Candace Hill has run a time that would have seen her finish seventh in the women's 100m at the 2012 Olympics.
Hill clocked 10.98 seconds at an invitational meet in Seattle to set the women's world youth record.
The time also bettered the British senior women's record of 11.02 set by by Dina Asher-Smith in May.
"I just had a feeling this would be a great race. I'm still speechless and in shock about the moment," said Hill.
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"It makes me think differently now that I am running a 10.98. That is among the professional times. It just feels incredible and that I have a bright future in front of me.
"I could go pro at an early age, but who knows?"
Only nine women in the world have run faster than Hill this year, with Olympic and world champion Shelly-Ann Fraser-Pryce of Jamaica the pacesetter at 10.81. The world record remains the 10.49 run by American Florence Griffiths-Joyner in 1988.
Hill had set her previous best of 11.21 a week earlier and could now try to qualify for the 2016 Olympics in Rio next summer.
"My coach wants me to go to the trials but he doesn't expect me to make the team and neither do I because there are a lot of skilled professionals there and it is a lot for my body," she said.