Boxing legend Muhammad Ali has been hospitalised with a respiratory problem.

The 74-year-old former world heavyweight champion, who was diagnosed with Parkinson's disease in 1984, is in a "fair" condition in hospital.

A statement from Ali's spokesman Bob Gunnell said: "Ali is being treated by his team of doctors and is in fair condition. A brief hospital stay is expected. At this time, the Muhammad Ali family respectfully requests privacy."

Ali was hospitalised in January last year for treatment on a urinary tract infection.