Earlier family spokesman Bob Gunnell had said on Friday that they had no update on Ali's condition. It is learned that Ali's daughters flew to Phoenix late Thursday and early Friday to be with their father.
Bob Arum, who promoted a multitude of Ali fights, told ESPN's Michele Steele, "I know it's not looking good. He's a fighter and he's going to continue to fight."
Ali, 74, was fighting respiratory issues that were complicated by the Parkinson's disease he was diagnosed with in the 1980s. "He is being treated by his team of doctors and is in fair condition," Gunnell said Thursday in a statement. "A brief hospital stay is expected. At this time, the Muhammad Ali family respectfully requests privacy."
The fighter's daughter, Laila Ali, said in a Facebook post on Friday: "Thank for all the love and well wishes. I feel your love and appreciate it."
When asked earlier, Ali's longtime Parkinson's doctor preferred not to comment on the matter. "I can't really say much more than what's in the papers," said Dr. Abraham Lieberman of the Barrow Neurological Institute in Phoenix.