US athlete Paul Kipkemoi Chelimo (back-L) falls behind (front L-R) Kenya's Cyrus Rutto, Canada's Mohammed Ahmed, Bahrain's Birhanu Balew and Ethiopia's Selemon Barega as they compete in the men's 5000m athletics event at the 2017 IAAF World Championships at the London Stadium in London on August 9, 2017. / AFP PHOTO / Glyn KIRK        (Photo credit should read GLYN KIRK/AFP/Getty Images)