Jack Sock, playing this week's ATP event in Washington, is now working with former USTA coach JayBerger. "He's been in my corner for so many years now, and I just really like his energy," Sock ...

The 18-year-old Harrison was working with USTA coaches Jay Berger and Diego Moyano much of last year, but decided to hire Damm after qualifying for the U.S. Open, where he upset 17th seed Ivan ...