High and low - Fred Kerley
(IAAF News)

During a breakout 2017 season, emerging 400m star Fred Kerley ran a blistering 43.70 to climb to seventh on the all-time lists and also snared the US one-lap title. We find out more about the exciting 22-year-old as he draws upon a hugely influential moment from his personal life and a serious injury which derailed his athletics career for a couple of seasons.