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LONDON, ENGLAND - JULY 09: Kendra Harrison of the United States leads Sally Pearson over the final hurdle as Jasmin Stowers of the United States craahes into her hurdle during the Women's 100m hurdles final during the Muller Anniversary Games at London Stadium on July 9, 2017 in London, England. (Photo by Richard Heathcote/Getty Images)

LONDON, ENGLAND - JULY 09:  Kendra Harrison of the United States leads Sally Pearson over the final hurdle as Jasmin Stowers of the United States craahes into her hurdle during the Women's 100m hurdles final during the Muller Anniversary Games at London Stadium on July 9, 2017 in London, England.  (Photo by Richard Heathcote/Getty Images)