I usually hate it when sports commentators say things like, "The only person that can beat XY is XY herself". I mean, in most cases, that's utter crap, isn't it? Winning and losing is based on all kinds of factors and there's no way a single player is in complete control of whether she wins or loses.

Then there's Serena Williams. She's scary good when she's on her game, confident and focused. And right now, she's on her game as much as I 've ever seen her. She overpowered a great tennis player in Victoria Azarenka today in the Wimbledon semi-finals, posting a 6-3 7-6(6) victory.

It's not like Azarenka played poorly, or was injured, or unfocused. She played a pretty good match. She was confident and active and capable.

It's just that Serena was that much better.

Williams dished out 24 aces in the match. TWENTY-FOUR! Against one of the best returners in the women's game. Including an ace on match point, just to put an exclamation point on things.

Azarenka never really stood a chance, did she, even if she put up a resolute fight in the second set, even managing to break Williams' serve along the way.

But how do you combat a serve that you can't get to?

Williams basically scored 24 uncontested points because of her serve. Enough points to win six games, an entire set, outright!

It's hard to believe that this is the same Serena who crashed out of the French in, what was it, the first round?

Agnieszka Radwanska awaits Serena in Saturday's Wimbledon finals and I'm sure she's a great player. I'm sure she'll put up a fight.

But, the way she's playing, I can honestly say that the only player who can beat Serena Williams right now is Serena herself. She's that good.