Day 11 of the Australian Open 2013 begins at 7 p.m. ET on Wednesday, with Sloane Stephens set to play against WTA's number one ranked player, Victoria Azarenka, at 10:30 p.m. ET in the women's semi final.

Sloane Stephens delighted tennis fans by causing one of the biggest upsets in the tournament to date, beating fellow American Serena Williams on Wednesday in the quarter finals. Serena was visibly upset at the result and was struggling with an injury in the second half of the 3-6, 7-5, 6-4 win for Stephens, who at just 19 years of age seems one of the brightest prospects for the United States in the women's game.

However, her reward for beating Serena Williams is to face Azarenka, who is the top-ranked women's tennis player in the world. She is the defending Australian Open Champion after beating Maria Sharapova in last year's final.

As Williams was knocked out she was seen breaking her racket in a video that has gone viral in the aftermath of the landmark win for Stephens. Watch a video of Williams breaking her tennis racket here.

Stephens vs. Azarenka should be a huge challenge for the American teenager and if she can cause another shock today then she will make a big landing on the world tennis scene. You can watch all the action from the game from 10.30 p.m. ET via ESPN's live stream by Clicking here

Whoeever wins the semi final will go through to the women's singles final scheduled for Sunday, Jan. 27 at 7:30 a.m. ET. They will meet the winner of the other women's semi final between Russian Maria Sharapova and China's Li Na which takes place on court prior to the Stephens and Azarenka match.

The men's final will be held at 7:30 a.m. ET on Monday, Jan. 28.

View the full schedule of the 2013 Australian Open here.

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