Upsets in Rio aside, Serena Williams and Novak Djokovic are poised to dominate their younger competition at the US Open, which starts Aug. 29.
- Life at the top: Serena, Djoker are Open No. 1s
- Top seed Radwanska cruises at Connecticut Open
- Murray falls to Cilic, has 22-win streak broken
- Kerber fails in attempt to unseat Serena at No. 1