titles:10 Highest ranking:No. 4 ( November 20 , 2006 ) Grand Slam results Australian Open QF ( 2008 ) French Open 3R ( 2006 ) Wimbledon 3R ( 2006 , 2007 ) US Open QF ( 2005 , 2006 ) Doubles Career record:89–88 Career titles:5 Highest ranking:No. 31 ( March 31,