It is their 14th meeting. Williams holds a 12-2 edge.
When the two top players and two biggest names in women's tennis clash it's a marquee matchup. Anytime the No. 1 ranking is on the line it's a showdown.
However, so lopsided have Williams' wins been over Sharapova that we can no longer consider this a rivalry. When one person in a so-called rivalry has won 11 straight, competition is now a quest for the loser.
What's going on between Williams and Sharapova is closer to Charlie Brown versus the football or the Coyote versus Road Runner. You know how it will end, but you tune in anyway just to see how the defeat will go down.
Of course Williams turns 32 this summer and Sharapova is only 26. So the Russian could pick up a few wins. However, Williams would have to play into her 40s for Sharapova to even the score.
It's just a bad matchup for Sharapova. Her biggest strength is power. At 6'2" Sharapova is taller than most women, and many men on tour. She uses penetrating ground-strokes to out-muscle opponents.
Williams is better than Sharapova at all other facets of the game. She has a better serve, is better at the net, plays with more topspin and moves better.
Sharapova's best chance is for Williams to have an off day.
If not, Williams will have another clip to archive in a series of dominant wins over Sharapova.