Here’s what to watch for from the U.S. gymnastics team.

The first day of women’s gymnastics is a marathon: The qualification rounds, which decide which teams and athletes will vie for medals, last about 12 hours.

For the Americans, the story to watch is which athletes, besides Simone Biles, will move on to the all-around competition and the event finals. Find out what you need to know, including how to watch, who’s who among the Americans, how the scoring works and how the team and individual qualifications work.