Lennox Lewis is the last undisputed heavyweight champion and an all-time great.
Lewis had a glittering career (41-2-1) avenging both defeats to Hasim Rahman and Oliver McCall.
He also holds notable wins over Evander Holyfield, Mike Tyson, David Tua and even Vitali Klitschko.
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The pair shared a memorable encounter in 2003 but Lewis ultimately came out on top due to the horrific cuts on Klitschko’s face and headed into retirement.
When speaking to The Ring, Lewis named the Ukrainian heavyweight as the smartest opponent he faced in his career.
He said: “Vitali used his awkwardness to good effect. Everyone said that I should have fought him again but he was just icing on my retirement cake. I took him on at short notice and despite being mentally ready, my physical preparation wasn’t ideal. I beat him at my worst so there was no need for a rematch. He definitely experienced the uppercuts.”