One world record is not enough for Keni Harrison (picture).

Hours after breaking the 28-year-old 100 metres hurdles record on Friday to avenge failing to make the US Olympic Games team, the young American revealed there is another race she wants to conquer.

“(I want to) try to get another record in the 400 hurdles,” Harrison told a conference call from London where she ran a record-breaking 12.20 seconds in the 100 metres hurdles.

She bettered the record of Bulgaria’s Yordanka Donkova from 1988 – four years before Harrison was born – by one hundredth of a second.

It came in Harrison’s first race since finishing sixth in the cut-throat US Olympic trials where only the top three advance to the Rio Games.

“I wanted to come out here with a vengeance to show these girls what I have,” said the 23-year-old, who defeated the three women who will represent the United States in Rio.

Harrison was a sure-fired favourite before the trials to make the US team and win gold at Rio after running the second-fastest 100 metres hurdles ever in May.

“The pressure got to me,” she said of the US trials.

“I was really heartbroken. I wanted to give up so bad.”

But calling it a season was not the answer, she realised.

“I knew this was the only way I was going to make myself feel better, to get back to training and go after that world record,” she said.

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