Muhammad Ali’s hometown of Louisville will honour the former boxing champion on Friday with a procession through the Kentucky city and public funeral at a sports arena, a tribute befitting a local hero who achieved global stature as a humanitarian.

The public service for Muhammad Ali, one of the most celebrated figures of the 20th century whose death brought accolades from around the world, will feature eulogies by former President Bill Clinton, broadcaster Bryant Gumbel and comedian Billy Crystal, family spokesman Bob Gunnell said.

The body of the former prize fighter, who died in Arizona after suffering for decades from Parkinson’s syndrome, was expected to be returned within the next two days to Louisville, where flags were lowered at city hall in his honour.

Ali was born Cassius Marcellus Clay Jr in Louisville on January 17, 1942, and was known as the “Louisville Lip” early in his boxing career because of his playfully boastful nature.

Fans gathered on Saturday at his modest childhood home on Grand Avenue, which has been converted to a museum, and at the Muhammad Ali Center, a cultural and educational venue, to pay their respects.

“Our deepest sympathies and heartfelt condolences are with the Ali family and friends at this time. He will be forever remembered as The Greatest,” the centre said.

Friday’s events were expected to begin with a private prayer service for family members at a Louisville funeral home.

The procession will then proceed along the city’s main streets, including Muhammad Ali Boulevard, to Cave Hill Cemetery, passing locations that were significant to the former champion.

The funeral service was scheduled for 2 pm at the KFC Yum Center, which seats more than 20,000 people, and will be live-streamed at the centre’s website.

Ali was admitted last Monday to a Phoenix-area hospital and died Friday night of septic shock due to unspecified natural causes, Gunnell said.

In his prime, Ali spoke out against racism, war and religious intolerance, while projecting a brash confidence and sense of pride that became a model for African-Americans during 1960’s and 1970’s.

Stripped of his world boxing crown for refusing to join the US Army and fight in Vietnam, Ali returned in triumph by recapturing the title and starring in some of the sport’s most unforgettable bouts.

In later years, Ali was admired for his grace in coping with a disease and as an ambassador for humanitarian causes.

The death of Ali was a huge talking point on Saturday for players competing in the NBA Finals, and prompted the Golden State Warriors to begin their morning practice with an Ali tribute song.

“We started our practice with the old song from the 70s, ‘Catch Me If You Can’,” said Warriors coach Steve Kerr, referring to the hit single ‘Black Superman’ which was released by British singer Johnny Wakelin in 1975.

Four-times NBA MVP Lebron James said that Ali paved the way for African-American athletes.

James’s tribute

“Without Muhammad Ali, I wouldn’t be sitting up here talking to you guys, I wouldn’t be able to walk in restaurants, wouldn’t be able to go anywhere where blacks weren’t allowed back in those days,” James said.

“We knew what a great boxer he was but that was only 20 per cent (of what) made him as great as he was.

“That was a guy who stood up for so many different things at a time when it was difficult for African-Americans to even walk the streets.”