ON TV

U.S. Open tennis: First Round

ESPN & ESPN2, beginning at 12 p.m. Live

The year's last Grand Slam returns to the USTA Billie Jean King National Tennis Center in Queens, with U.S. Open early rounds beginning today. Rafael Nadal and Sloane Stephens are reigning singles champions. ESPN and ESPN2 combine to televise the tournament through Sept. 9.

"The Simpsons" Marathon

FXX, beginning at 6 p.m.

Episodes of The Simpsons from Seasons 7-8 are in tonight's marathon on FXX. Highlights include "The Day the Violence Died," "A Fish Called Selma," "Bart on the Road," "22 Short Films About Springfield," "Homerpalooza" and "You Only Move Twice."

So You Think You Can Dance: "Top 6 Perform"

FOX, 8 p.m.