The world's top sprinters enter the equation later Saturday, with the United States, who have won more golds in the event than all other nations combined, determined to take Bolt's mantle and regain their supremacy. 
Akatswiri a liwiro pa dziko lonse ayamba nawo kupikisana tsiku loweruka, pamene dziko la United states, lomwe linawina zikho za golide kuposa maiko ena onse kuphatikiza, lili ndi chidwi kuti litenge ukatswiri kwa Bolt ndikukhazikitsanso ukulu wawo.