Friday's matchups at the 2012 U.S. Open include men's favorite Novak Djokovic in second round action vs. Sergio Dutra Silva and Venus Williams and Serena Williams vs. Klaudia Jans-Ignacik and Kristina Mladenovic in second round doubles action. Djokovic's match is scheduled for approximately 1 p.m. and the Williams sisters are scheduled at approximately 3:30 p.m.

Other big matchups include Maria Sharapova against Mallory Burdette in women's third round play at approximately 1 p.m. and Andy Roddick, who announced on Thursday that he will retire after the 2012 U.S. Open, vs. Bernard Tomic in men's second round action at 7 p.m. See the full Friday schedule at the U.S. Open website.

Among the notables advancing on Thursday were Mardy Fish on the men's side and Agnieszka Radwanska, the No. 2 seed on the women's side.

Television coverage of Friday's action runs from 6 a.m. to 7 p.m. on the Tennis Channel and from 1-11 p.m. on ESPN2.

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