Tampa Bay resident John Isner's third-round match against No. 19 seed Philipp Kohlschreiber headlines a busy Sunday at the U.S. Open. The ninth-seeded Isner has yet to make it out of a third round in this year's three Grand Slam tournaments. A quarterfinal run at the 2011 U.S. Open marked Isner's best-ever finish at a Grand Slam event.
Elsewhere in third-round action: No. 2 seed Novak Djokovic gets action underway from Arthur Ashe Stadium at 11 a.m. ET, and No. 20 seed Andy Roddick will follow with a match against unseeded Fabio Fognini. At Louis Armstrong Stadium, No. 14 seed Alexandr Dolgopolov plays No. 18 seed Stanislas Wawrinka no earlier than 1 p.m. ET.
In the women's draw, No. 3 seed Maria Sharapova faces off against No. 19 seed Nadia Petrova in an all-Russian fourth-round match.
For Sunday's full schedule, check the US Open's official website.
CBS Sports and CBS Sports Network have coverage from Flushing Meadows from 11 a.m. to 6 p.m. ET before Tennis Channel begins coverage at 7 p.m. ET.