It's looks cold.
Athletic clothing aside, I don't know how she plays in all those layers.
Me neither, I've always thought it really hampers your movement, especially when serving. But Vika can't be bothered.
Also I doubt we're going to see her without the layers soon this RG because the temperatures look cold till the end of the week.
And yes I agree with those saying 2009/2011 Miami+RG were her best outfits so far. Especially RG 2011.