Hunt delivers most stunning Lesnar sledge yet

Mark Hunt has sensationally questioned Brock Lesnar's motivation for returning to the Octagon ahead of their massive bout at UFC 200.

Hunt reckons the WWE superstar 'feels guilty' because he cheated his way to the heavyweight title in 2008.

Lesnar is preparing for his first UFC fight in five years, and Hunt is furious his opponent has been granted a drug testing exemption.

Lesnar says he has an 'itch to scratch' in UFC, with a debilitating battle with diverticulitis defeating him in his last two fights.

However Hunt says there's a different reason for the much-anticipate return.

"He's got an itch to scratch and that's because he doesn't know if cheating got him that title," Hunt told foxsports.com.au.

"Once you have the title and you're cheating, everything you've done you look back and say 'did I do that cleanly, or by cheating?' Well, only god and you know that.

"When I hang up the gloves and stop fighting ... I'm not going to look back and say 'I've got to go scratch an itch' because I've done it clean."