Originally Posted by 18majors
Azarenka, Kvitova, Maria and Woz can compete with JJ consistently. Other than that, Serena and Clijsters are part timers and Na Li is either very good or very bad.
JJ can be a top 5 player if she is committed.
7 hours a day in the off season is committed to me.
There is some very serious technical and mental problems she has to deal with first before committing to the game.