Simone Biles (America's most decorated gymnast) resigned from the final of women's gymnastics on Day 4 of the Tokyo Olympics citing mental health concerns.USA Gymnastics has confirmed that Biles was unable to compete in the final team competition because of a medical condition.The statement stated that she will be evaluated daily to determine her medical clearance for future competitions."Biles clarified later in a press conference her decision to withdraw wasn't due to a physical injury, but because she was not in the right headspace to compete. She also needed to improve her mindfulness."I was shaking so much that I couldn't sleep, it was almost like I was shaking." Biles stated that she had never felt this excited about entering a competition.She said, "Warming up in the back went slightly better, but then when I came out here, I was like, No, mental IS not there so I just have to let the girls do that and concentrate on me."The USA women's team finished second with a silver medal. They were defeated by the Russian Olympic Committee, who won gold and were immediately congratulated and praised by Biles and her teammates. Great Britain came in third place, winning a bronze medal.On Tuesday, the 24-year-old was a little shaky and performed 1.5 twists instead 2.5. She also landed with a large correction. She earned a score 13.766, which was the lowest score for the first rotation.Biles was disappointed by her first performance and said that it wasn't her best. She explained that she had made the decision not to continue to contribute to the team but that she believed her peers would succeed.Biles stated, "I knew the girls would do an absolutely fantastic job and I didn’t want to risk giving the team a medal because of my mistakes. They’ve worked way too hard so I decided that those girls should go and complete the rest of this competition."According to Tokyo reports, the athlete was seen leaving Ariake Gymnastics Centre carrying her bag. She was then attended by a trainer.