Eight fighters will take part in Prizefighter Heavyweights III
Former Olympic champion Audley Harrison and current British champion Danny Williams have signed up for the latest heavyweight Prizefighter event.
The eight-man, one-night knockout tournament will take place at ExCel in London on 2 October, with the winner walking away with £32,000.
Harrison, a gold medallist in Sydney in 2000, believes victory could provide a springboard to greater things.
"I've just been ticking over waiting for a door to open," said Harrison, 37.
Harrison, who has lost four of his last eight fights, said the prospect of gaining revenge over Michael Sprott, who knocked him out in 2007, was another spur.
"It's not about the money for me, it's about putting myself back at the top but having Michael Sprott in there [who Harrison lost to in 2007] is an added bonus," said Harrison.
I can't wait to get revenge, that's my main hope for this. I've been eating properly and training hard so no more messing around
"Hopefully I will get a chance to rectify that loss and I would also like to fight Danny Williams again as I've had two fights with him.
"I beat him last time [in 2006; Williams beat Harrison in 2005] and it doesn't matter if Danny trains for six hours, six days or six months, what happened last time will happen again.
"I've been banging the drum about being world champion and it has not worked out and people have hung me by that. But my confidence has not diminished one bit.
"But if my arm is not raised at the end of the night I would really question myself. It's like the Michael Jackson song 'Man in the Mirror', I've looked at myself and the answer coming back has been 'yes, you can'."
There have been seven previous Prizefighter events but Williams will be the first current British champion to participate.
If he fails to win the competition he may be stripped of his title by the British Boxing Board of Control and he admits he is taking a big risk.
"When I was offered this, especially with Audley Harrison being involved, I was very excited," said the 36-year-old Williams.
"I can't wait to get revenge, that's my main hope for this. I've been eating properly and training hard so no more messing around.
"If Audley Harrison or Michael Sprott [who has beaten Williams twice and lost against him once] were not in this I wouldn't be in it. I want them.
"I'm training so furiously for this and this is must-win for me. Life is a gamble but I will take that gamble to fight Audley Harrison and Michael Sprott."
Promoter Barry Hearn said: "This will be the most exciting night in British boxing for years and years. Prizefighter has evolved and resurrected my passion for boxing."
List of competitors for Prizefighter Heavyweights III: Coleman Barrett (Galway, Ireland), Scott Belshaw (Lisburn, Northern Ireland), Scott Gammer (Pembroke Dock, Wales), Audley Harrison (London), Michael Holden (Manchester), Danny Hughes (Sunderland), Michael Sprott (Reading), Danny Williams (Brixton).