Mohamed Ali was admitted to hospital on Saturday for mild pneumonia, but it should be out shortly.
The prognosis is good for has indeed said his spokesman.
The former boxer is also suffering from Parkinson's disease since 1984.
At the premiere of the film "I am Ali", on October 10, his younger brother had mentioned his difficulties in expressing themselves.
Cassius Clay became Muhammad Ali at the age of 22, after joining the Nation of Islam. Its activists commitments as his boxing prowess - triple champion world heavyweight champion and Olympic Games in Rome in 1960 - have made him a legend in boxing.
