LONDON, ENGLAND - AUGUST 05:  Thiago Andre of Brazil, Emmanuel Kipkurui Korir of Kenya and Marc Reuther of Germany compete during the mens 800m heats during day two of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 5, 2017 in London, United Kingdom.  (Photo by Alexander Hassenstein/Getty Images for IAAF)