Enzo Maccarinelli is set to fight unbeaten American Johnathon Banks for his old WBO cruiserweight crown.
The Welshman lost the WBO title to David Haye in their big unification clash at the O2 Arena in March.
Haye has informed the WBO he intends to vacate their cruiserweight belt to move up a division and bid to fight heavyweight champ Wladimir Klitschko.
The WBO has now requested purse bids for the Maccarinelli v Banks show, which is set to be in September.
IBO champion Banks is number one in the World Boxing Organisation rankings.
But the WBO have overlooked unbeaten Russian Alexander Alekseev and awarded Maccarinelli a shot at the vacant title.
"I'm totally focused and determined to regain my belt," Swansea showman Maccarinelli told BBC Sport.
"I can't stop thinking about the fight and I'm desperate to show that Big Macc is back."
Maccarinelli was destroyed by Haye in their hugely-anticipated Battle of Britain as the Londoner knocked him out in the second round.
"My defeat by Haye has been eating away at me - and I want to show everyone that is a one-off.
"I hate being referred to as a former world champion, it makes my stomach turn.
"I hate losing and I'll come back fitter, stronger and more hungry."
The WBO have told interested promoters - such as Big Macc's manager Frank Warren - that the minimum acceptable bid will be $300,000 (£150,000) when the WBO decides who will host the title bout on Tuesday.
Banks, a three-time American amateur champion, is unbeaten in 20 professional bouts and fights out of the world-famous Kronk Gym in Detroit.
The Welshman lost the WBO title to David Haye in their big unification clash at the O2 Arena in March.
Haye has informed the WBO he intends to vacate their cruiserweight belt to move up a division and bid to fight heavyweight champ Wladimir Klitschko.
The WBO has now requested purse bids for the Maccarinelli v Banks show, which is set to be in September.
IBO champion Banks is number one in the World Boxing Organisation rankings.
But the WBO have overlooked unbeaten Russian Alexander Alekseev and awarded Maccarinelli a shot at the vacant title.
"I'm totally focused and determined to regain my belt," Swansea showman Maccarinelli told BBC Sport.
"I can't stop thinking about the fight and I'm desperate to show that Big Macc is back."
Maccarinelli was destroyed by Haye in their hugely-anticipated Battle of Britain as the Londoner knocked him out in the second round.
"My defeat by Haye has been eating away at me - and I want to show everyone that is a one-off.
"I hate being referred to as a former world champion, it makes my stomach turn.
"I hate losing and I'll come back fitter, stronger and more hungry."
The WBO have told interested promoters - such as Big Macc's manager Frank Warren - that the minimum acceptable bid will be $300,000 (£150,000) when the WBO decides who will host the title bout on Tuesday.
Banks, a three-time American amateur champion, is unbeaten in 20 professional bouts and fights out of the world-famous Kronk Gym in Detroit.
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