BYDGOSZCZ, POLAND - JULY 20: Abdalelah Haroun from Qatar competes in men's 400 meters qualification round during the IAAF World U20 Championships at the Zawisza Stadium on July 20, 2016 in Bydgoszcz, Poland. (Photo by Adam Nurkiewicz/Getty Images for IAAF)
BYDGOSZCZ, POLAND - JULY 20: Abdalelah Haroun from Qatar competes in men's 400 meters qualification round during the IAAF World U20 Championships at the Zawisza Stadium on July 20, 2016 in Bydgoszcz, Poland. (Photo by Adam Nurkiewicz/Getty Images for IAAF)
BYDGOSZCZ, POLAND - JULY 20: Christopher Taylor from Jamaica competes in men's 400 meters qualification round during the IAAF World U20 Championships at the Zawisza Stadium on July 20, 2016 in Bydgoszcz, Poland. (Photo by Adam Nurkiewicz/Getty Images for IAAF)
BYDGOSZCZ, POLAND - JULY 20: Kahmari Montgomery from USA competes in men's 400 meters qualification round during the IAAF World U20 Championships at the Zawisza Stadium on July 20, 2016 in Bydgoszcz, Poland. (Photo by Adam Nurkiewicz/Getty Images for IAAF)
BYDGOSZCZ, POLAND - JULY 20: Marcus Krah from USA competes in men's 110 hurdles qualification round during the IAAF World U20 Championships at the Zawisza Stadium on July 20, 2016 in Bydgoszcz, Poland. (Photo by Adam Nurkiewicz/Getty Images for IAAF)
