in 2007 Sharapova was already struggling with her shoulder problems , there was a decline in her form.
This thread is about peak vs peak , the main problem is that Sharapova had very short periods of "peak" form. Tennis became too physical and Sharapova was one of the last teenagers to try to play on the level of elder players, it might have affected her career eventually
So pls speak about PEAK vs PEAK ,
I do think that Peak Serena is /was better that Sharapova, as well as she was better than anyone in WTA , but Sharapova was one of a few players who could be competitive with Serena
decline already in 2007?
I thought everyone agreed that her AO 2008 form was her best ever