US: All four of the United States’ men’s 100m sprinters advanced to the finals on Saturday, giving the Americans renewed hope of a clean sweep in the event for the first time since 1991. Toe-to-toe at 7:50 p.m. will be Fred Kerley, Marvin Bracy, Trayvon Bromell, and Christian Coleman (0250 GMT). There have been no clean sweeps since Carl Lewis …