Audley Harrison wants David Haye to 'man up and fight' after the pair agreed to a bout in November.
Harrison and promoter Eddie Hearn have reportedly been in negotiations with Haye's manager Adam Booth over a fight at the MEN Arena in Manchester.
Harrison's camp claims that terms are agreed but WBA world champion Haye is yet to commit.
He told Haye: "I'm about as bored as every other fight fan about hearing why you won't accept fights, what are we in this game for?
"I say to try and win titles and create a legacy but if its money you want then outside of the Klitschko fight I'm the only guy that makes you money.
"I am accepting the terms you have offered me and now we will see what you are made of.
"So let's stop with the bull*******g, man up and get this fight signed. So bring on the Battle of Britain and I will be the Hayebreaker come November 13."