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Obviously my grandfather, I've been thinking of him so much. I miss him. It's been an emotional journey,' ESPN quoted Ali Walsh as saying.
'I think me and him (Weeks) made a little bit of history tonight. This lived up completely to my expectations.'
Muhammad Ali, nicknamed 'The Greatest', died in June 2016. His record-setting boxing career, unprecedented flair for showmanship and controversial stands made him one of the best-known figures of the 20th century.
Walsh wore the same boxing shorts designed for his legendary grandfather in the 1960s
The American is the son of Ali's daughter Rasheda Ali Walsh, the pair hugged after the fight
Ali Walsh pictured with his legendary grandfather, The man dubbed 'The Greatest' died in 2016
Ali Walsh, who is trying to follow in his grandfather's footsteps into professional boxing, said Muhammad Ali was 'the greatest fighter who lived'.
'It seems like a lot of pressure; to me, it's just my grandfather,' said Ali Walsh, who grew up in Las Vegas.