Mr Bruno took to Twitter to express his condolences, writing: “So sad to hear the news that the hugely talented Errol Christie has passed away. God bless you Errol, RIP.”
Fellow boxing legend Chris Eubank tweeted: “Errol Christie, one of the old masters of boxing, has passed away. I sparred with him many times in our early 20s and he was a sweetheart.”
Mr Christie was a regular fixture on ITV Fight Night during the 1980s.
Earlier this month, Mr Christie’s nephew Cyrus Christie, a defender for Derby Football Club, told the Mirror his uncle was struggling to fight his illness.
He said: “My uncle’s got over 100 tumours in his body, he’s had it for quite a while now – nobody has survived that long with what he’s got. The tumours are that strong they’re pushing through his body.
Mr Christie’s nephew added: “He told me he can’t fight any more, it’s too much for him now — and he’s always been positive. That’s the first time I’ve heard anything negative coming from his mouth.”
The late sporting legend was born in Leicester in 1963, and started boxing at the age of eight at the Standard-Triumph gym in Coventry.
After turning professional in 1983, he won his first 13 fights, 12 of them inside the distance.
Mr Christie retired from boxing in 1993 and worked as a market trader for six years.
Mr Christie also worked with children in schools and community centres during his time as a mentor.
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