The U.S. women's 4x100m relay team, featuring Olympic champions Sha'Carri Richardson and Gabby Thomas, advanced to the final despite a shaky baton handover that gave Germany an advantage. In the 400m hurdles, Sydney McLaughlin-Levrone set a new world record at 50.37 seconds, successfully defending her Olympic title and defeating teammate Anna Cockrell. Team GB's women, led by Dina Asher-Smith, are optimistic about their chances against the U.S. team, citing a strong performance in their semi-final. Meanwhile, the U.S. men's 4x100m relay team secured a spot in the final but may see changes in their lineup prior to the race. The U.S. men's team last won a medal in this event in 2004, which adds pressure to perform well. The upcoming relay finals promise significant competition as both U.S. teams aim for gold.