Four-time Olympic champion Simone Biles says she was sexually abused by former Team USA gymnastics sports doctor Larry Nassar.
In an emotional statement, Biles, a star of the Rio Games, said she would not let Nassar "steal my love and joy".
Nassar was jailed for 60 years for possessing child sex abuse images and has also admitted assaulting gymnasts.
"I know this horrific experience does not define me, I am much more than this," said Biles, 20.
Three former US Olympians have accused Nassar of sexual abuse under the guise of medical treatment, including Gabby Douglas, who won gold with Biles in the team event at the 2016 Rio Olympics.
Nassar will be sentenced this month over two cases in which he admits assaulting female gymnasts.
The 54-year-old was jailed in December for three counts relating to child sex abuse images on his computer.
Nassar's lawyers told BBC Sport they would not comment on Biles' statement.
USA Gymnastics said in a statement it was "absolutely heartbroken, sorry and angry that Simone Biles or any of our athletes have been harmed by the horrific acts of Larry Nassar".
Sadly we come across many incidents of abuse connected to those in positions of trust teaching sports, particularly gymnastics. If the abuse is closely connected to the perpetrator’s employment with a gymnastics club, then the club employing the abuser is likely to be vicariously liable for the misdeeds carried out. We often find that young sports persons delay coming forward with their allegations because they may not fully understand what has happened to them at the time of the abuse. Understandably sometimes they find the pressure of trying to achieve in the sport (and particularly the power the abuser wields over their ability to progress in their chosen profession) is too great to jeopordise disclosing abuse.
Fortunately it is often possible to bring claims for compensation later in life and we are experienced at dealing with reasons for delay in coming forward to ensure your case is presented strongly.
Below is a selection of organisations/instutions/bodies we are frequently instructed to pursue.
Private schools, boarding schools, local authority schools, closed schools, hospital schools.
The Scouts Association, St Johns Ambulance, MIND, the Children’s Society, Barnados.
- Football trainers, judo teachers, dance instructors, swimming instructors, holiday activity centres, nurseries, youth clubs.
Local Authorities/Ministry of Defence
- County Councils, Borough Councils, City Councils, ILEA, cadets, navy/ army (forces).
National Health Service Trusts/Commissioning Boards/GPs
- Hospitals, Disability care centres, children’s care providers.
- Convicted perpetrators, acquitted perpetrators.
- Respite care, full time children’s home, part-time children’s homes.
- Roman Catholic Church, United Synagogue, Sisters of Nazareth, Jehovah’s Witnesses, Christian Brothers Order.
- Permanent carers, temporary carers
"Your help in pursuing and fighting my case is greatly appreciated, not by just myself but my whole family. Only through the progression of the case have I found it easier to talk about it and this has helped deal with something I had locked away since the day I left the school. It has allowed me to talk about my experiences far more openly and without the stigma of shame I had felt for so long.
Once again thank you sincerely for your time and patience in dealing with my case."
Abuse Survivor, St Georges School, Norfolk