U.S. broadcast coverage on Friday night includes track and field, basketball and BMX.

Katie Ledecky, right, will swim in the 800-meter freestyle, her final event in Tokyo, on Saturday morning.Credit...Doug Mills/The New York TimesHere are some highlights of U.S. broadcast coverage on Friday evening and overnight. All times are Eastern.

BASKETBALL The U.S. women faced Japan in a preliminary-round game. NBCSN has the rebroadcast at 8 p.m.

TRACK AND FIELD Coverage of the men’s 800-meter heats, the men’s pole vault, and the women’s 400-meter and 100-meter hurdles begins at 8 p.m. on USA Network.

SWIMMING Katie Ledecky swims the 800-meter freestyle, her final event in Tokyo, where she has already collected three medals. Coverage begins at 9:30 p.m. on NBC. The network also has the…