Former cruiserweight world champion and Sky Sports, Johnny Nelson, believes heavyweight Daniel Dubois has displayed that he has 'quit in his DNA.’

Nelson is making an obvious reference to Dubois' 2020 defeat at the hands of Joe Joyce.

During that fight, Dubois was up on the cards when he took a voluntary knee - for the full count - during the tenth round. Dubois would later explain that he momentarily lost the ability to see in his left eye. The badly swollen eye had sustained a fractured orbital bone and surgery was later required.

Dubois appeared to redeem his reputation back in December, when he suffered a knee injury during the first round of his fight with Kevin Lerena. While getting knocked down, Dubois hurt his knee and was struggling to put weight on the leg - a situation which created two more knockdowns. The end appeared near, but Dubois was able to regroup by the second round and rallied to stop Lerena in the third.

On Saturday night, Dubois steps in the ring for the biggest fight of his career when he challenges WBA, IBF, IBO, WBO heavyweight champion Oleksandr Usyk in Poland.

However, Nelson feels that once a fighter quits in the ring there is always a possibility that he will do it again.

"Dubois showed he has quit in his DNA. That might be part of [his] naivety but he showed he has that in him," Nelson told Metro.co.uk.

"And once a fighter has shown that he has it in him, it gives the other fighter more energy, more drive, more ambition to put a fighter under pressure. He has got quit in him and Usyk knows it. He is a brilliant fighter but he has that in him. And it is something you can’t just shake off. I’m quite sure he hasn’t wanted to switch off and quit mid-fight, but it’s in you and you can do nothing about it. We will see when the pressure is on again if maturity changes things but I don’t think so. Nothing can change it."