A busy day at the Louis Armstrong Stadium gets underway at 11 a.m. ET as Day 6 action at the U.S. Open begins. Headlining the day's action are gold medal winner Andy Murray on the men's side and Agnieszka Radwanska on the women's side.
Here are several matches to keep an eye on::
Louis Armstrong Stadium, 11 a.m.:
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)
Arthur Ashe Stadium, 11 a.m.:
Jelena Jankovic (SRB)  vs. Agnieszka Radwanska (POL) 
CBS Sports Network will broadcast all of the action from 11 a.m. to 6 p.m. The Tennis Channel will handle the evening matches from 7-11 p.m.