Muhammad Ali's family was gathered at his bedside today as reports in the US stated he was on life support and "barely breathing".
The 74-year-old was taken to hospital in Phoenix, Arizona on Friday to be treated for a respiratory issue.
Bob Gunnell, the family spokesman, said he was in fair condition, and a brief hospital stay was expected. On Friday Mr Gunnell said there was no update on his condition, but two family sources told AP that his condition was more serious than in previous hospital stays.
Ali has been treated in hospital several times in recent years, most recently in early 2015 when he was treated for a severe urinary tract infection initially diagnosed as pneumonia.
US gossip site Radar Online said they had been told the former heavyweight champion was barely breathing.