Anthony Joshua wants to "see the money" before agreeing to Deontay Wilder's $50m (£35.9m) unification fight offer, says promoter Eddie Hearn.
American heavyweight Wilder posted a video on Twitter showing WBO, IBF and WBA titles holder Joshua, 28, saying he would accept the fight for $50m.
But Hearn said he must be convinced the money "exists" before agreeing to the bout "in either London or Vegas".
The offer came via an email directly from WBC champion Wilder, said Hearn.
In a video interview on Wednesday, Hearn also said:
The offer "feels like a PR move" but they are "definitely interested"
He would not rule out allowing Wilder's team to pick the fight's date and location.
A meeting between both fighters and their advisors is set for Friday.
Previously Wilder, 32, said "all the money is in the bag so I expect you will be a man of your word".
Source - BBC Sport
