Usain Bolt is favored to win in his last career 100m race at the world championships on Sunday, even though four men in the field have run faster than him this year.
Bolt is known for turning it on at global championships. In 2015 and 2016, he laid down his fastest time of the year in the world championships and Olympic finals.
If that history is repeated, Bolt will run sub-9.9 seconds in London on Saturday (3 p.m. ET, NBC and NBC Sports Gold).
“I think it will have to be 9.