With Andy Roddick's announcement that this year's U.S. Open would be his last tournament before he retires, all eyes will be on the No. 20 seed as he goes up against No. 7 Juan Martin Del Potro at Arthur Ashe Stadium on Tuesday evening. The fourth round match is scheduled for 6 p.m. CT.

Also in men's singles, No. 2 Novak Djokovic will meet No. 18 Stanislaw Warwinka at about 2 p.m. CT at Arthur Ashe. Before that, No. 4 David Ferrer will face No. 13 Richard Gasquet at Louis Armstrong Stadium at 11 a.m. CT.

On the women's side, No. 1 Victoria Azarenka will meet defending champion Samantha Stosur at 10 a.m. CT at Arthur Ashe. That will be followed by No. 3 Maria Sharapova against No. 11 Marion Bartoli at approximately noon CT.

The full schedule and draw are available at the U.S. Open's official website. Television coverage begins on ESPN2 at 10 a.m. CT.

Stay with this StoryStream for more U.S. Open coverage, and be sure to visit SB Nation's tennis hub for even more news and analysis from Flushing Meadows.