Before diving into today’s action in Rio, look back at what the shocking Sunday of upsets means for the Olympics' place on tour. On Monday, Novak Djokovic’s vanquisher Juan Martin del Potro moved on with a win over Joao Sousa, and he faces wildcard Taro Daniel next. Gilles Muller and Roberto Bautista Agut were other men's winners.
On the women’s side, Angelique Kerber knocked out Eugenie Bouchard, while Madison Keys moved on in a thrilling battle over Kristina Mladenovic. Monica Puig continued her dream run, beating Anastasia Pavlyuchenkova to set up a clash with Garbine Muguruza.