Double defending champion Trey Hardee was dumped out of the decathlon on the opening day of the world championships on Saturday as he no-heighted in a dramatic high-jump competition.
Ashton Eaton is more concerned with getting a medal than breaking his world mark. The American is ahead of the pack after the opening three events of the Olympic decathlon Wednesday, amassing an 105-point lead over World champion Trey Hardee.
Gatlin stormed to the lead in the final 20 metres and defeated favoured youngster Christian Coleman in the 100 metres final at the US nationals/world championships trials on Friday.
The Olympic silver medallist surpassed American Ashton Eaton's 9,045 total at the 2015 world championships in Beijing.
Russia claimed the IAAF's decision to continue its ban of Russian athletics on Friday was unfair and threatened legal action, while the rest of the world welcomed the move and urged the IOC not to go against it.
Australia's Sally Pearson completed one of the great sporting comebacks when she overcame two years of injury agony to win the world 100 metres hurdles title at the age of 30.