Fred Kerley warned the USA will chase global domination after he was crowned world 100m champion. Favourite Kerley claimed the 100m title ahead of team-mates Marvin Bracy (9.88 seconds) and Trayvon Bromell (9.88 seconds) as the States sealed a home clean sweep in Eugene on Saturday night. He clocked 9.86 seconds at the World Athletics Championships to add to the 100m Olympic silver he won in...