Brianna Rollins, at just 21-years-old, has broken the American 100 metre hurdles record at the U.S Track Championships in Iowa.

Her time of 12.26 seconds now stands as the fourth fastest time in the history of the event, and the fastest in 21 years, and broke Gail Dever's previous American record, which was set in 2000.

The record is even more remarkable considering Rollins turned professional only last month and she has assured her status as one of the US’ best track talents.

Another star of the future was confirmed in the form of Mary Cain. The 17-year-old 1,500 metre runner, claimed second in the event – behind Treniere Moser – and booked a spot at the World Championships as a result.

Elsewhere, Olympic gold medallist Sanya Richards-Ross could only manage sixth place in the women’s 400metres, as she continues to recovery from injury, with Natasha Hastings winning in a time of 49.94 seconds.

Although the day will be remembered for the emergence of new stars, there was good news for the experienced LaShawn Merritt, as he won the men’s 400 metres in 44.21 seconds and for Olympic champion Ashton Eaton, who took the gold in the decathlon event.


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