Jamaica’s Usain Bolt became the first athlete to win three Olympic 100m titles by beating American Justin Gatlin to gold at Rio 2016. Bolt, 29, ran 9.81 seconds in his final Olympics to replicate his success at Beijing 2008 and London 2012. Gatlin, twice banned for doping offences, finished 0.08 seconds behind Bolt to take silver. “I expected to go faster, but I’m happy that I won,” Bolt told BBC Sport. “I’m here to perform.