Jamaican 'sprint king' Usain Bolt completely outpaced American arch-rival Justin Gatlin, clocking 15.55 seconds, to win a fourth record consecutive world 200m title on Thursday to add to the 100m gold he won at the weekend and seal another world championship double sprint gold. 

The 29-year-old Bolt eased to his 10th world championships gold medal with Gatlin, who has served two doping bans, second best at 19.74 second. with South African Anaso Jobodwana taking bronze with a national record of 19.87 seconds.