I know pictures can be very deceiving guys. Nonetheless I'm going to bring this up: Petra looks bigger than normal (look at her legs and upper body compared to Safarova). I've seen other pictures between the two, where the discrepancy doesn't appear so large.
I had also heard someone on GM mention (not always the most reliable source), that she looked out of shape. And I must admit (if these pictures are representative), she does here.
That new Fitness guy, may have his work cut out.
Well, she's got a month.