The Wembley bout between Anthony Joshua and Wladimir Klitschko looks set to break records with 50,000 tickets sold after going on sale overnight.
The first batch of tickets for the April 29 fight went on sale and were quickly snapped up. Promoter Eddie Hearn now has his sights on a crowd of 90,000.
The Mirror reports that Hearn has permission to sell 80,000 tickets and request to increase the capacity by another 10,000 if approved by London mayor Sadiq Khan.
The next batch of tickets will go on sale on January 16. Ticket sales alone could make 8 million pounds (NZ$14.3m) with the broadcast rights another reported 42 million pounds (NZ$74.8m).
Joshua is the IBF heavyweight world champion while Klitschko is the former WBA, WBO and IBO champion.