World boxing icon, Muhammed Ali, has been hospitalised again and he is fighting for his life.

His nine children have rushed to be at his bedside as doctors treating the former heavyweight champion say they fear he “is near the end," the Mirror says.

The Mirror says sources close to the once flamboyant boxer revealed that Ali’s battle with his respiratory problem has been complicated by the Parkinson's that he was diagnosed with in the 1980s.

“Like in the ring, Ali is a fighter on the ward,” said a source.

“Doctors are working to regulate his breathing put it is being hampered by his Parkinson’s.

“His children are all extremely concerned and dropped everything to be with him. They fear the worse.

“Ali is everything to them and there are worried his problems are worse than first feared.”