Mardy Fish has hired former top-ranked doubles player Mark Knowles to coach him. The 40-year-old actually won the 2012 San Jose doubles title in February with Xavier Malisse, and competed as recently as the week before last at the Dallas Challenger. He knows Fish from their days training together in Florida. Knowles will continue to compete on and off.

"He's a huge help," Fish told reporters. “He's got his work cut out for him the past month or so trying to get me back on track. He's got a great tennis mind. He's been around for a long time. He's played in this era; obviously still plays. We played doubles in 2010 together. He helped me a ton at that time, as well, just sort of mentally on the practice court and things like that. I thought sort of getting sort of a new voice would be beneficial. I still train with the USTA in L.A. and with [coach] David Nainkin still and spend a lot of hours on the practice court with him, those guys, so I'm still fully vested in the USTA, as well ... I've always thought, and a lot of the guys in the locker room think, that [Knowles] is one of the best tennis minds out there. He reminds me a lot actually of Justin Gimelstob just how he knows this era, knows, watches so much."