But she (#2 in the world) comfortably beat Saville who is ranked 349 and has a WC into the Australian Open.
Think WTA is trash but doubt a male ranked between 900-1000 would beat Serena.
She did NOT comfortably beat Saville. She didn't beat him at all. She clearly said in the article that the set took too long to finish. She beat Kokinakkis. Which doesn't surprise me, because despite Kokinakkis' big game, he's still extremely raw with at this point a terrible return of serve, and poor defensive shots (his anticipation isn't great at this stage and while I don't think he's slow he's 6'3 and probably still growing).
So even if he could overpower her, his raw game likely means unforced errors which the far more experienced Sharapova could have exploited. Plus there's the simple fact that players simply don't play practice matches with anything like the intensity of a competitive match. They take a lot more risks with their shot making and try things they wouldn't in a real match. Just like people say you shouldn't take exhibitions seriously, that would go doubly so for practice matches.
I'm somewhat surprised by the mental midget misogynists here though. Some of the posters on this thread must have been rejected too many times asking girls out. You may not like women's tennis, but the vitriol directed their way goes way above and beyond simple dislike into something more disconcerning. I would suggest seeking out a therapist.