Justine Henin has not won a slam event outside the French Open since the 2004 Australian Open. I think what is holding her back is her serve and return of serve. If you look at all the players in the top 50 her serve and return of serve would be very good. However if you just look at the 8-12 contenders her serve and return of serve would probably be slightly below average among that group. Players like Serena, Venus, Sharapova, Vaidisova, Ivanovic, are far superior to her in both those areas, serve and return of serve. Mauresmo does not have a better return, but has a much stronger serve when she is in sync. Hingis and Jankovic do not have better serves, but probably better return of serves. I think that is the main thing holding her back from winning an Australian, Wimbledon, or U.S Open again. She needs to upgrade in those 2 areas if she can. What do you think?