The eyes of the world will be on tonight's final in the women's floor exercise, in which Team USA's Simone Biles is expected to successfully defend her gold medal from Rio in 2016 as well as continue her pursuit of the record for the most gold medals won by a single gymnast in the history of the Olympics. Also on tap tonight are the finals in the men's 400m hurdles and women's long jump and a quarterfinal match in the women's beach volleyball.