Justin Gatlin (R) of the United States celebrates with his teammate Jeff Henderson after men's 100m final at the 2019 IAAF World Athletics Championships in Doha, Qatar, Sept. 28, 2019. (Xinhua/Wang Jingqiang)

Justin Gatlin of the United States celebrates after men's 100m final at the 2019 IAAF World Athletics Championships in Doha, Qatar, Sept. 28, 2019. (Xinhua/Wang Jingqiang)

Justin Gatlin (R) of the United States hugs with his teammate Jeff Henderson after men's 100m final at the 2019 IAAF World Athletics Championships in Doha, Qatar, Sept. 28, 2019. (Xinhua/Wang Jingqiang)