
After getting past Kiki Bertens 7-6 (5) 6-3 at the U.S. Open, Serena Williams needs five more wins to achieve the rare calendar-year grand slam.

Williams seemed more relieved than anything else. She won despite hitting 10 double faults, including four in one game.

Rafael Nadal, in a slump, didn't play his best against Argentina's Diego Schwartzman but still won in straight sets.

American Mardy Fish, a former top-10 player, played his last match after losing to Feliciano Lopez in five sets.

Fish had missed most of the past two years due to a heart ailment and then anxiety. His final tournament could have been extended, since he served for the match in the fourth set.

Defending men's champion Marin Cilic moved into the third round by ousting qualifier Evgeny Donskoy in straight sets.

Despite needing treatment for a back injury, 2014 Wimbledon semifinalist Milos Raonic defeated Fernando Verdasco in four sets.

Raonic's fellow Canadian, Eugenie Bouchard, won a slugfest against Polona Hercog to record back-to-back wins for the first time since March.

With a big serve, Madison Keys -- a semifinalist at the Australian Open -- seems to have a bright future. The 20-year-old crushed Tereza Smitkova in the second round.