A hit uneven bars routine from Jordan Chiles means that Sunisa Lee will have to fight for her chance to defend her medal. She will need a 14.800 to beat Chiles.

But first, Simone Biles on bars.

Her beam routine left a little to be desired, but Hezly Rivera will be much happier with a 13.900 on bars. Rivera's day is now done and the 16-year-old's Olympic debut is off to a great start.

The U.S. women are well on their way to qualifying for every gymnastics event final, including the team final. As they prepare to close out this qualification round on bars, a tight race is emerging between Sunisa Lee and Jordan Chiles.

The two are currently within a point of each other and their performances on bars will determine who advances to the all-around final. Simone Biles is the overwhelming favorite to qualify in first place, but Lee and Chiles will battle it out for the second U.S. spot.

Lee, who has a higher starting value on bars, has the edge to defend her all-around title, but she must stay on.

Her warmup was a nail-biter, but Biles turned it on when it mattered. A 15.800 for her eponymous vault will almost certainly be the highest score we see all day.

Biles is displaying incredible fortitude here; performing that vault on an ankle that may be bothering her is no easy feat.

Her first vault score will count toward her all-around total. Her second vault, a Cheng, scored a 14.800. A 15.300 average will easily put her on track to make the vault final, along with her teammate, Jade Carey.

Although Jade Carey's devastating floor score will prevent her from defending her gold medal, she is on pace to contend for a vault medal.

She earned a 14.433 average with a Cheng and a double-twisting Yurchenko. Carey is capable of adding a half twist to the second vault, which we may see in the final

That will outscore Jordan Chiles. Simone Biles, who is arguably the best vaulter in the world along with Brazil's Rebeca Andrade, is up next.

To qualify for a vault final, gymnasts must perform two vaults from two different "families," which means they must do contrasting skills onto the table. Jordan Chiles did a double-twisting Yurchenko and a Lopez, averaging a 14.216.

Chiles is one of three U.S. gymnasts who will attempt two vaults, along with Jade Carey and Simone Biles. They are all capable of making the final, but again, only the top two Americans will qualify.

Vault is not Sunisa Lee's strongest event, but she cruised though it with a clean double-twisting Yurchenko. A 14.133 is a great score for Lee.

She'll wrap up her competition on her best event, the uneven bars.

While preparing to compete on vault, Simone Biles began to limp and hop on one foot down the runway. She landed short on a warmup of her "Biles II" vault, but appears to be all smiles despite the difficulties.

Because her eponymous vault is quite dangerous and short landings can put stress on her ankle, she will prefer to over-rotate rather than under-rotate it.

Simone Biles has the most difficult floor routine in the floor and she executed it with unmatched finesse.

Despite getting her ankle taped after her one-touch warm up, she earned a 14.600. She and her training mate, Jordan Chiles, are on track to make the floor final.

Luckily, Team USA will be able to drop Jade Carey's 10.633.