| By Anthony Pastecchi
Photo credit: Anthony Pastecchi

On Wednesday at the 2011 U.S. Open, 19-year-old American Christina McHalefrom New Jersey took down eight-seed Marion Bartoli from France in straight sets. Venus Williams withdrew from the tournament suddenly after being diagnosed with Sjogren's disease.

On Day Four of the event on the women's side of the draw, we will see Venus's sister Serena Williams take on Michaella Krajicek of the Nederlands in an attempt to match up against fourth-seed Victoria Azarenka from Belarus in the third round. Another American, Sloane Stephens, is taking on 23rd-seeded Shahar Peer of Israel on Thursday on the Grandstand in an attempt to continue her success at the age of 18 and provide yet another big win for the U.S. after yesterday's upset by McHale.

The number seven seed, Francesca Schiavone from Italy, will face Mirjana Lucic from Croatia at Arthur Ashe Stadium; top-seeded Caroline Wozniacki from Denmark meets Arantxa Rus from The Netherlands under the lights this evening at Arthur Ashe Stadium; the number 11 seed, and Serbian Jelena Jankovic faces Australia's Jelena Dokic at Louis Armstrong Stadium.

On the men's side, American Mardy Fish will be taking on Tunisian Malek Jaziri at Louis Armstrong Stadium. Fish has lost five out of the last seven times in the second round. Other notable men's matches today include Juan Carlos Ferraro of Spain taking on the number seven seed, Frenchman Gael Monfils; Bernard Tomic of Australia taking on the number 27-seed Marin Cilic of Croatia; and the number three seed Roger Federer from Switzerland takes on Israel's Dudi Sela at Arthur Ashe Stadium.

Under the lights tonight at Arthur Ashe Stadium, top-seeded Novak Djokovic from Serbia looks to up his record to 59-2 on the year as he faces Argentinian Carlos Berlocq; the number nine seed, Tomas Berdych from the Czech Republic will face Italy's Fabio Fognini in afternoon action on the Grandstand; and the number 11 seed, Jo-Wilfried Tsonga from France takes on Sergei Bubka from the Ukraine.

Along with great matches today, Steve Buscemi of HBO's Boardwalk Empire, Stephen Root from the film Office Space and HBO's True Blood, New York Mets pitcher Tim Byrdak, and Charles Kelley and Dave Haywood of the band Lady Antebellum are among the celebrities expected to attend matches on Day Four of the 2011 U.S. Open.