screwups, because they worked way too hard for that. reporter: teammates suni lee, jordan chiles and grace mccallum stepping up. biles cheering them on from the sidelines, saying that she stepped aside to take care of her mental health. i say put mental health first. it s okay sometimes to even sit out the big competitions to focus on yourself. reporter: and japan s naomi osaka dealt a crushing blow. the tennis superstar, number two in the world, losing to czech republic s marketa vondrousova, ranked 42nd. osaka telling reporters, i definitely feel like there was a lot of pressure for this. reporter: the alaskan assassin, lydia jacoby, upsetting teammate lilly king in the 100-meter breast stroke. will simone biles compete in the individual competition? she s taking it one day at a time. james, thank you. when we come back tonight,