Madison Bumgarner became the first pitcher in 48 years to hit two grand slams in a season, and Buster Posey also hit a slam Sunday that boosted the San Francisco Giants over the Arizona Diamondbacks 8-4.
Michael Phelps turned in perhaps the most impressive performance so far in his comeback, posting the third-fastest time in the world this year while easily beating rival Ryan Lochte in the 100-meter butterfly at the Bulldog Grand Slam on Friday night.
The time is now for Petra Kvitova, Eugenie Bouchard and Simona Halep. And they know it. With Serena Williams' mysterious slip, the rising stars have battled their way into Grand Slam finals and made the sport all the more compelling.