Re: Masha's Best Rivalry?
Henin was a great rivalry because it was two polar opposites going at it. One player was famous and relished the spotlight, the other was shy and reserved. One built her game around raw power, the other around guile. And they played some great matches (the 2007 Tour Championships and the 2006 Australian Open semis were both nailbiters). Plus Maria's victory over Justine at the Aussie Open in 2008 was the performance of her career.
I also love the Azarenka rivalry because their games are similar but different enough and they clearly can't stand each other. Makes for great drama.