Re: Nav: Azarenka & Kvitova to be great rivals, Sharapova may not be able to keep up
Maria will more often that not come up short against both players, particularly Azarenka due to it being nightmare match up for her, owing to her stark inconsistency, further exacerbated by Azarenka's consistent grinding + her ability to be aggressive where absolutely neccessary. Simply put , both are better than her at this stage.
However to count out Sharapova on fitness is quite ridiculous and quite frankly shows ignorance on Martina's part. Azarenka is still the least fit of the three. She has already withdrawn once this year and there's no conclusive evidence that she'll cut out her retirements now that she's #1 and a Slam champion whereas Maria returned from a (from what I've read) serious ankle injury and was still able to get to a Slam final, playing rather well in the early stages and defeating one of the players in question en-route. So yes , in short , Martina's conclusion may be correct but her reasoning not so.
A Kvitova + Azarenka rivalry would be uplifting for the game and create some tension and excitement once more. However, Vika needs to start beating Petra a couple of times first.