2021 Tokyo Olympics hero Marcell Jacobs, who succeeded Usain Bolt as the 100-m champion, remains relatively unknown outside Italy yet plans to defend his Olympic title.

2021 Tokyo Olympics hero Marcell Jacobs, who succeeded Usain Bolt as the 100-meter champion, remains relatively unknown outside of Italy. Despite dealing with injuries, the Texas-born Italian athlete prefers to "stay under the radar" and focus on his preparation and performance. Jacobs, who won't compete in all races, aims to defend his Olympic title.