Top-seeded Roger Federer and No. 4-ranked Serena Williams will highlight the Day 6 action of the 2012 U.S. Open on Saturday at Arthur Ashe Stadium.
Federer will face No. 25-ranked Fernando Verdasco of Spain at 11 a.m. at the tournament's center stage. Williams will face unseeded Russian Ekaterina Makarova in the afternoon after 1 p.m.
Other third-round matches of note are American Sloane Stephens facing No. 12-ranked and former world No. 1 Ana Ivanovic at 7 p.m. American No. 23-ranked Mardy Fish will take on No. 16-ranked Gilles Simon of France on the men's side.
Here are more notable third-round scheduled matches:
Arthur Ashe Stadium, 11 AM:
Jelena Jankovic (SRB)  vs. Agnieszka Radwanska (POL) 
Louis Armstrong Stadium, 11 AM:
Andy Murray (GBR)  vs. Feliciano Lopez (ESP) 
Sam Querrey (USA)  vs. Tomas Berdych (CZE) 
Dominika Cibulkova (SVK)  vs. Roberta Vinci (ITA) 
Angelique Kerber (GER)  vs. Olga Govortsova (BLR)
CBS Sports Network along with CBS Sports will be broadcasting all of the action from 11 a.m. to 6 p.m. The evening matches can be seen on the Tennis Channel from 7-11 p.m.
All times are Eastern.
For more on the 2012 U.S. Open and other tennis news, notes, and analysis, head on over to SB Nation's Tennis Hub.