Arguably the greatest boxer of all time, Muhammad Ali, has died at the age of 74.

Ali, who was regarded as the greatest fighter the sport has ever produced, also fought a 32-year battle with Parkinson's disease. The boxing legend died today in Phoenix after a brief battle with respiratory illness.

The man who 'floats like a butterfly, stings like a bee' compiled a lifetime 56–5 win-loss record, as well as an Olympic gold medal and the Presidential Medal of Freedom. He was also an outspoken civil rights activist and, to say the least, outspoken about his own abilities – and rightly so.

"Muhammad Ali transformed this country and impacted the world with his spirit," said boxing promoter Bob Arum. "His legacy will be part of our history for all time."

Watch Muhammad Ali's top 10 knockouts

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