Rafael Nadal kept alive his dream of a third Olympic gold on Tuesday, powering into the men's doubles quarter-finals alongside teammate Carlos Alcaraz as Andy Murray once again came back from the dead. A tearful Coco Gauff crashed out of the singles after a heated row with the umpire but women's top seed Iga Swiatek cruised into the last eight. In the men's draw, defending champion Alexander Zverev reached the third round after beating Tomas Machac of the Czech Republic in straight sets and was joined in the last 16 by Russia's Daniil Medvedev, playing as a neutral.