According to this kinda sketchy source, JJ's finally latched onto a coach, hiring former ATP pro Andrei Pavel. I only remember him as the guy who retired to Moose on that super dupery hot day at the 2009 Australian Open. But if you believe the aforementioned kinda sketchy source, Pavel reached a career-high rank of #13 on the WTA.
So...I guess he knows what it takes to win on the WTA. Good job, JJ!
(Pic: ATP Official Site)