Men`s 4x200m preview - IAAF/BTC World Relays Bahamas 2017
(IAAF News)

Few events exemplify recent history in the men´s relays better than the 4x200m at the IAAF World relays, which at the first two editions has seen formidable US quartets fall to a litany of errors as Jamaica took the title with ease, their reliable exchanges the key difference on both occasions.