Justin Gatlin ruined Usain Bolt's farewell party when the 35-year-old American won the world 100 metres title on Saturday, beating the Jamaican superstar into third.

What was meant to be a glorious celebration of the departure of one of sport's greatest showman turned into a condemnation of Gatlin, who was twice banned for drug offences.

Al Jazeera's Elise Holman reports.