Serena Williams vs. Victoria Azarenka: 4-Time Wimbledon Champ Will Roll to Final

Victoria  Azarenka may be the No. 2 women's tennis player in the world, but Serena Williams will look like No. 1 by the time she's done with the 22-year-old.

Both Azarenka and Williams advanced to the semifinals of Wimbledon 2012 on Tuesday. Azarenka  defeated unranked Tamira Paszek 6-3, 7-6.

Williams knocked out defending champion Petra Kvitova 6-2, 7-5.

But, Williams has history on her side.

In eight head-to-head matchups between the formidable females, Williams has won seven of them. She's won the last five head-to-head matches—including a straight-set victory in the quarterfinals of Wimbledon 2009.

Williams, of course, also has four Wimbledon singles titles to her name, and she's coming off an impressive victory against Kvitova.

She appears to actually be getting stronger as the tournament goes on, as evidenced by her 13 aces on Tuesday. She racked up 17 winners to only four unforced errors in the first set, then displayed a blistering service game and eye-opening return game in the hard-fought second set.

Azarenka won't be an easy opponent, however. She hasn't dropped a set through five rounds at Wimbledon 2012 and ranks fifth in the tournament in first serve return points won (85), according to Wimbledon.com.

When you're serving like Williams is, it has a way of causing even the best returners to crumble. Williams has not only touched 120 mph on her serve this tournament, she's recorded an astounding 61 aces.

Sabine Lisicki is second with 34.

Williams is exemplifying the form of a, well, four-time Wimbledon champion. 

Just in time for the last two rounds of Wimbledon 2012.