It will be the end of an era for athletics on Saturday when Usain Bolt races for the last time in the men's 4x100 meters relay at the World Championships.
The Jamaican is hoping to step away from the track having won his 20th global championship title, something he was denied last week when he finished third in the 100m behind American Justin Gatlin.
Jamaica's Usain Bolt waves to spectators after the final of the men's 100m athletics event at the 2017 IAAF World Championships at the London Stadium in London on August 5, 2017. /AFP Photo
Jamaica's Usain Bolt waves to spectators after the final of the men's 100m athletics event at the 2017 IAAF World Championships at the London Stadium in London on August 5, 2017. /AFP Photo
Fans flocking to the London Stadium on Saturday will probably be treated to a double dose of the 30-year-old sprint legend as Bolt plans to take part in the relay heats in the day's first session.
There will be a fair amount of emotion from the stands as Mo Farah also runs in his last track race - the 5,000 meters final.
The Briton is aiming to complete an unprecedented World Championship triple-double, having retained his 10,000m title on the first day - the home nation's only medal.
Britain's Mohamed Farah competes in the men's 5000m athletics event at the 2017 IAAF World Championships at the London Stadium in London on August 9, 2017. /AFP Photo
Britain's Mohamed Farah competes in the men's 5000m athletics event at the 2017 IAAF World Championships at the London Stadium in London on August 9, 2017. /AFP Photo
The penultimate day of the championships also has former 100-meter hurdles champion Sally Pearson of Australia going up against world record holder Kendra Harrison of the US for the title.
The decathlon reaches its climax with the traditional 1,500m to close the multi-discipline event.
There are also gold medals to be won in the women's high jump and the men's javelin.