In Bolt's shadow

For the first time since 2004, someone other than Bolt will be the Olympic champion in the men's 100 and 200.

Bolt's bet for the 100? Trayvon Bromell, who won the US track trials after overcoming issues with his Achilles that nearly ended his career.

A 17-year-old named Erriyon Knighton has already broken Bolt's under-18 and under-20 world records in the 200. Knighton figures to give world champion Noah Lyles a run for his money in the event.

Knighton counts Bolt and Lyles as his biggest on-track inspirations.

"Coming from my generation, I don't know many," Knighton said.