Serena is beatable from the back of the court by a strong baseliner. The problem is that she knows it, so she makes sure she dominates with her serve and return so she crushes the "points between 0-4 shots" category so completely there's little rallying involved. Sharapova will need to either serve out of her mind, return out of her mind, or catch Serena on one of those days when the serve just won't click (e.g. Bencic at Toronto). But since she's who she is, Serena will bring her best.
Saw some people wanting more Raonic love, and Rohit Brijnath (I've searched far and wide, and I think he's clearly the best active English language tennis writer) has came through, writing on
his win over Wawrinka. Here are some of his earlier articles on
Maria Sharapova,
Serena Williams,
Novak Djokovic,
Aga Radwanska and
Kei Nishikori, all still in the AO 2016.
And of course,
Roger Federer.