The former World No.1 has called it a career at 25.
Former world No. 2 receives wild card into New Haven qualifying.
Meet Riki, a primate prime-time tennis player.
"The only way I can play the US Open this year is if I leave Leo behind in California, which I'm not willing to do," says former No. 1.
Wimbledon semifinalist says small change made major difference in his season.
Former No. 1 opens up about "bottomless hole" after drug ban in interview with Hamptons Magazine.
The Romanian said she was happy to drive with her coach Darren Cahill, and felt safer on the ground.
