Whoever improves on the weakest part of their game will own the other by end of 2013
Both have an inconsistent & unreliable serve, both return well with Vika having the edge.
Vika is consistent on her deep ground strokes, is very athletic and moves far better than Maria
Maria is mentally tougher, not by a wide margin but hit the lines hard with accuracy
Based on these observations, I say 3-2 Vika ...they may not even meet at all
because of the other big cats interfering