Jamaican sprinter Usain Bolt has labelled his recent 100m victory over American arch-nemesis Justin Gatlin at the World Athletics Championship as the 'hardest race' of his career.
The 29-year-old admitted that the race was tough for him especially after coming back from injury, adding that he felt good to defend his title, the BBC reported.
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Bolt added that the win meant a lot for him as he had been struggling all season and having problem with his start.
Bolt, who had been struggling to find form throughout the season, clocked 9.79secs to defend the title he won in Moscow two years ago.
Bolt had also stumbled around for the first few meters out of the blocks, but wrestled his way back to win the first semi-final in 9.96secs.
Controversial American sprinter Gatlin, who has served two doping bans, clocked 9.80secs to finish second, ahead of his fellow American Trayvon Brommell and Andre de Grasse of Canada.
