I know there is a lot of endorsement money riding on it, but women's tennis has to get less sensitive about weight. To go back to fighting as an analogy, fighters actual weights are known, at least 24 hours before a fight. There weigh-ins are televised. They forfeit half their contract for not making weight.
Sharapova's wta bio lists her weight at 130lbs. She's 6'2.
Errani's listed weight is 132lbs. She's 5'4.
Ronda Rousey, the women's Strikeforce 135lb champs, is 5'6", a razor lean, like most mma fighters. See below.
If Rousey is 135 lbs, Sharapova is 180lb easy. Bearing in mind Sharapova is literally EIGHT inch taller, and has those big wide shoulders.
Serena listed weight of 155lbs is ... probably a bit fantastical as well, but Serena's only 5'9. (And a half, if you ask me. She shorter than Clijsters though.)
Are we really to go along with the fantasy that the physical size and power of Sharapova and Serena make NO difference?