(CNN)Usain Bolt began his bid for Olympic history in the 100m heats, while fellow great Michael Phelps made his farewell in the pool.
- Phelps bows out with 23rd Olympic gold medal (11.22 p.m.)
- U.S. first nation to win 1,000 Olympic gold medals (11.10 p.m.)
- Thompson beats Jamaica teammate Fraser-Pryce in women's 100m (10.44 p.m.)
- Russia's sole athletics competitor is suspended by the IAAF (3.44 p.m.)
- Big shock as Puerto Rican wins women's tennis final (7.55 p.m.)