Four-time Olympic gold medalist Simone Biles registered a couple of stumbles and penalties in her initial performance Monday at Ariake Gymnastics Center in Tokyo, allowing the team representing the Russian Olympic Committee to grab a one-point lead in the women’s team competition entering Tuesday’s finals.

But she committed uncharacteristic errors during the vault and floor exercise qualifying rotations as the heavily favored U.S.

Obviously there are little things we need to work on, so we’ll go back and practice and work on that, just so we can do our best performance at team finals, because that’s what matters,” Biles told reporters.

Biles landed outside the floor boundaries on one tumbling pass during her floor routine, and she also stepped outside the lines on her first vault

Elsewhere on the American team, Jordan Chiles made mistakes on the uneven bars and fell off the balance beam, Grace McCallum stepped out of bounds during her floor routine and Lee had two of her scores (vault/floor) dropped from the team competition

Russian athletes officially are not representing their country following a doping scandal, with use of the country’s name, flag and anthem banned from the Summer Games