Let's keep it straight.
Maria played well yesterday. When was the last time Maria's serve stats were that good? When was the last time she won that many points charging the net?
The problem with Maria's game is that her tennis arsenal is very limited, thus when her game plan does not work she can't pull a plan B out of her sleeve. This is a curse of all ball-bashers.
Per Aga. I think it was an outstanding example of assuming a perfect strategy, and then a perfect execution thereof. She had a very clear blueprint in her mind, and followed it to perfection. Aga's variety was Maria's nightmare, as it completely exposed her lack of mobility.
Each time when Maria found herself outmaneuvered and out of position, she was forced to make yet another error. These were all forced errors, errors forces by Aga's deep, fantastic placement of the ball.
Now, for Aga it is all mental. Aga is not Martina Hingis, Aga is Aga Radwanska, very unique, unorthodox player that woman tennis do not see often. Aga had kept on losing to power players in the past (like Venuses, Marias, etc.) because of her lack of believe, she was losing those matches in her head.
It is the same mechanism with her losses to Vika right now. Aga loses to Vika, at the moment, not because she is a worse tennis player but because Aga let herself think she can't beat Vika (which apparently started during their match at AO, and was reinforced by Aga's subsequent stupid comments creating pressure Aga does not handle well).
With the growing confidence, Aga should overcome all those mental obstacles. Nothing is guaranteed in tennis. I guess, this is why we all love it so much, but I think there is a high likelihood that we can expect big things coming from Aga in the future.
You go, Aga!!...and in the meantime please withdraw from Charleston, it does not make any sense for you to play another week of tennis, take a break, go home and recharge your battery