"Dima is under a dropper, he will undergo additional procedures, in particular computed tomography," RIA Novosti quotes Bolotova.
Earlier it was reported that a video of the conflict with the participation of Solovyov was published.
The fight took place on the night of December 20-21 near a karaoke bar.
The 32-year-old figure skater stood up for two-time European curling champion Anna Sidorova.
After the incident, Solovyov was taken to the Botkin hospital and placed in the neurosurgical department.
Police officers in hot pursuit detained two suspects.
Law enforcers establish all the circumstances of the incident.