Its time for Martina to improve her serve?
Justine Henin Hardenne is shorter than Martina and yet she is so much more explosive and powerful. Justine is only 5 foot 5 or 5 foot 6. And yet Justine has a powerful serve when its on, and she also goes for her second serves. By contrast Martina doesn't bend her knees enough when she serves and doesn't accelerate into the ball and get good wrist snap. Martina needs to improve on her serve if she really wants to be no.1 or back in the top again. She will still move up the rankings of course, but if Martina Hingis really wants to be a top top contender she needs to go for her serve a bit more. She can do it, its just a matter of if she wants to.