Saturday is a full day at the 2012 U.S. Open, with Serena Williams, Roger Federer and Andy Murray all in action. Murray, the No. 3 seed in the men's singles draw, has a match against No. 30 seed Feliciano Lopez. Williams, fourth-seeded in the women's singles draw, faces off with unranked Ekaterina Makarova, and following that match No. 1 seed Roger Federer will face No. 25 Fernando Verdasco.
Second seed Agnieszka Radwanska is currently facing No. 30 Jelena Jankovic, with Williams and Federer's matches coming after. The prime time matches for the day are Sloan Stephens vs. Ana Ivancovic and Gilles Simon, both taking place after 4 p.m. PT.
Television Coverage: 8-9:30 a.m. PT on the CBS Sports Network, and 9:30 a.m. - 3 p.m. on CBS
For a complete list of Saturday's matches, head over to USOpen.org.