The women of Team USA take center stage on Day 4 of the Tokyo Paralympics. Among the day's biggest events: Allysa Seely and her teammates attempt another triathlon podium sweep, Tatyana McFadden races for her first medal of these Paralympics, and Jessica Long looks to win her 25th career medal.

Elsewhere, it's win-or-go-home for the United States wheelchair rugby team as the semifinals get underway, and two Americans compete in table tennis semis.

Below is a rundown of what to watch on Day 4 of the Paralympic Games. All events listed below can be streamed live on NBCOlympics.com, and many can also be seen as part of the Olympic Channel and NBCSN broadcasts.

Live coverage of the Tokyo Paralympics begins on Olympic Channel at 5:30 p.m. ET with several triathlon events. Later on in the broadcast, U.S. star Tatyana McFadden will have her first medal race of these Paralympics as part of the track & field coverage.

The broadcast picks up at midnight ET on NBCSN and will include semifinals in wheelchair rugby, U.S. games in wheelchair basketball and goalball, and medal events in swimming and track & field.

The United States swept the podium in the women's PTS2 triathlon at the 2016 Paralympics, and all three women involved in that sweep are back for Tokyo. Allysa Seely (the 2016 gold medalist), Hailey Danz (the 2016 silver medalist) and Melissa Stockwell (the 2016 bronze medalist) are all ranked in the top 10 internationally, and Danz is the current world No. 1. Stockwell, who was wounded during a deployment to Iraq in 2004, was selected as one of two U.S. flagbearers at this week's Opening Ceremony.

In the men's PTVI triathlon, an event for athletes with vision impairments, Brad Snyder will compete at the Paralympics for the first time as a triathlete. The U.S. Navy veteran won a combined seven medals (five gold, two silver) in swimming at the last two Paralympics, but in 2018 he announced that he would be switching to triathlon.

Holding a 1-1 record after their first two games, the U.S. women take the court to play China, which sits at 3-0 and is the only unbeaten team left in Group B. Rose Hollermann (34 combined points) is Team USA's leading scorer so far in the group stage.

On the men's side, the United States plays Great Britain in its third game of the tournament. It's a matchup that pits the defending Paralympic champions (Team USA) against the reigning world champions (Great Britain). The U.S. defeated Iran comfortably yesterday to move to 2-0 in group play, as Steve Serio (12 points, 10 assists, eight rebounds) nearly posted a triple-double.

Once again, the day's track & field events will be broken into two sessions. The first session has eight medal events, including the women's 5000m T54 final (9:06 p.m. ET). The event, which is exclusively for wheelchair racers, will feature U.S. star Tatyana McFadden competing in her first of five events at these Paralympic Games. With 17 medals and five Paralympic appearances (including Tokyo), she's among Team USA's most well-known and most successful Paralympians ever.

Nine more medal events headline the day's second session. The youngest athlete on the U.S. Paralympic Team, 16-year-old Ezra Frech, will make his debut in the men's long jump T63 final (6:51 a.m. ET). Five years ago, Frech—just 11 years old at the time—predicted his future Paralympic appearance in this home video seen below:

The U.S. women are off to a good start in the goalball tournament, winning their first two games of the preliminary round. Amanda Dennis scored four goals in the opening six minutes to lead Team USA in yesterday's 10-0 shutout of Egypt. Up next is a matchup against Japan, a team which has yet to win in its first two games.

The wheelchair rugby tournament moves out of the group stage and into the semifinal round. In the first semifinal, Japan plays Great Britain. Despite being involved in several very close games, Japan finished group play with a spotless 3-0 record. The reigning world champions are now one win away from reaching the gold medal match on home soil.

The day's other semifinal will feature the United States playing Australia. Like Japan, the U.S. was unbeaten during the group stage. Although Australia has a 1-2 record in this tournament, the two-time defending Paralympic champions will still be a dangerous opponent for Team USA. The Aussies' two defeats came by a combined four points.

A pair of Americans will compete in the semifinals of their respective table tennis classes: Jenson van Emburgh in Class 3 and Ian Seidenfeld in Class 6. A win would advance them into their respective gold medal matches, both of which would also take place on the same day.

After earning a bronze medal in her backstroke race last night, American star Jessica Long returns to the pool for the women's SM8 200m individual medley, looking to add to her now-24 career Paralympic medals. She's the three-time defending Paralympic champion in this event.

Other Americans with medal hopes on Day 4 include Sophia Herzog and Mallory Weggemann in the women's SB6 100m breaststroke and Robert Griswold in the men's SM8 200m medley. Griswold, who has cerebral palsy, set a world record in his backstroke race yesterday to win his first-ever Paralympic gold medal. Weggemann also win a gold medal—the second of her career and first since 2012—yesterday.

In total, 14 medal races will take place on this day.