City's Bernardo Silva and Mateo Kovacic both misfired in the shootout to put Madrid in the driving seat
Biles shocked the world when she withdrew from the team finals on Tuesday, citing mental health issues, and has since withdrawn from all the other competitions she was eligible for, except the beam, which takes place on Tuesday.
"Simone has withdrawn from the event final for floor and will make a decision later this week on beam," USA Gymnastics said in a Tweeted statement.
"Either way, we're all behind you, Simone."
There was no immediate information on who would take her place.