Tickets went on sale on Monday for the eagerly-anticipated clash between Oleksandr Usyk and Tony Bellew.
Cruiserweight king Usyk puts his four world titles on the line against Bellew on November 10 at Manchester Arena.
According to Usyk advisor Egis Klimas, sales went very well indeed.
“I have never seen anything like that, tickets sale just flying! Wow, the UK has a great boxing fan base!” he declared.
A capacity crowd of 20,000 is expected to pack the formerly M.E.N Arena on fight night, with Manchester’s own Anthony Crolla set to co-feature.
Ex-lightweight ruler Crolla has been handed a final WBA eliminator against Daud Yordan.
31 year-old Yordan has three losses in 41 and is a former IBO title holder.
WBA President Gilberto Mendoza was present to ratify the situation, which could eventually see the winner facing Vasyl Lomachenko next year.
Lomachenko, the current pound for pound number one, was at the press conference to support Usyk, one of his best friends.
Promoter Eddie Hearn also confirmed another 135 pound battle on the card as Joe Cordina takes on one-time British champion Scott Cardle.
Olympian Cordina is aiming to build on his recent victory over Sean Dodd after claiming the Commonwealth strap.
Cardle, who also holds a win over Dodd, is looking to get back in contention following two domestic losses.
A fourth match-up to be set for November is a featherweight rematch between Ryan Walsh and Isaac Lowe.
Walsh and Lowe traded blows at the same venue back in February, fighting out a split draw for the coveted Lonsdale Belt.
Oleksandr Usyk v Tony Bellew
(Undisputed cruiserweight titles)
Anthony Crolla v Daud Yordan
(WBA lightweight title eliminator)
Joe Cordina v Scott Cardle
(Commonwealth lightweight title)
Ryan Walsh v Isaac Lowe
(British featherweight title)
More fights will be confirmed by Matchroom Boxing in the coming weeks.
Phil Jay is Editor of World Boxing News. Follow on Twitter @PhilDJay