Gennady Golovkin vs Kell Brook was made in a matter of days, Eddie Hearn tells George Gigney KELL BROOK accepted the same deal Chris Eubank Jr was offered to fight Gennady Golovkin on September 10, Eddie Hearn has revealed. In a stunning announcement earlier today, it was revealed IBF welterweight champion Brook will jump to 160lbs to take on the fearsome Kazakh, who owns the WBC, WBA and IBF world titles. Hearn was deep in negotiations for Eubank to get a fight with GGG, but has revealed Chris and his father missed their chance and Brook wasted no time when presented with the offer. We were negotiating the Eubank fight for a long time, as you can imagine that was extremely difficult, we got close, he told Boxing News. We set them [the Eubanks] a deadline and it wasnt adhered to. They didnt come back in time for the deadline. I phoned Kell later that night to talk about Vargas and I said Do you want to fight Golovkin? He asked if I was serious and I told him I hadnt spoken to them [Golovkins team] about it but I know theyd love it, its a huge fight and he just said yeah, Ill fight Golovkin. 100 per cent. So we moved probably within 24 hours. It happened over 36-48 hours, and I didnt want to get involved in any of the speculation because I didnt want to ruin the chance of Golovkin fighting in the UK. The unbeaten pair will meet at the O2 Arena in London, with Sky Sports Box Office broadcasting the pay-per-view show in the UK and HBO picking up the US TV rights. Brook was also set to meet WBO welterweight champion Jessie Vargas later this year, though an announcement was never made, making the Golovkin-Brook confirmation even more shocking. Much like Eubank Jr-Golovkin, Hearn was close to closing the deal but there were still obstacles. They were close, we were always a little bit out with the money, trying to get a date. When the Eubank-Golovkin fight came about that was a big opportunity to bring Golovkin to the UK and I really wanted to do it, but it meant wed have two pay-per-view dates and its very difficult setting the dates for those fights, he continued. The dollar rate and I know I get stick for mentioning it it added 12 to 15 per cent onto the Vargas deal, it was a killer. But everythings just slotted into place. Its a standard pay-per-view deal, its the same deal Anthony Joshuas on, the same deal Carl Froch was on. We give them ownership of the profit of the show and we take a percentage. Its the most transparent deal out there. Yes, Chris Eubank Jr was offered the same deal that Kell Brook accepted, its the same deal Anthony Joshuas on. We were ready to sign the fight for Eubank, but they made it so difficult. Eubank Snr allegedly caused most of the issues, demanding control of operational aspects on the night. Brook has been installed as a heavy underdog for the clash, due in part to the huge leap in weight he must make to face arguably the hardest puncher in the sport today. However, per the IBFs rules, there will be a check weigh-in on the day of the fight, meaning neither fighter can massively rehydrate. Indeed Hearn remains convinced that Golovkin, who stands an inch taller than Brook and whose reach is one centimetre longer, will not have a significant weight advantage on fight night. He [Golovkin] is the number one fighter in the world and I feel Kell Brook is the number one welterweight in the world, the difference is; people talk about the weight, its definitely a disadvantage, but Kell is a massive welterweight, really he should fight at light-middle (super-welter), he said. We know all about Gennady Golovkins weight, hes not a huge middleweight hes a huge punching middleweight but we also know weve got a weigh-in on the Saturday with the IBF, which helps a lot. On fight night I dont think therell be a huge difference in weight, yes well be giving away size but I think Brook carries power through the weights. Hes up against it, but were in it to win it, one thousand per cent. Since dethroning Shawn Porter in 2014, Brook has been unable to nail down the marquee fights his obvious talents deserved and fans had become disgruntled with his title defences against the likes of Jo Jo Dan, Frankie Gavin and Kevin Bizier. Hearn, who always promised he would secure a big fight for his charge, is proud to have lured GGG into the ring with Brook. He said: Weve been looking for this kind of fight for Kell Brook for so long, and hes taken some stick. Hes wanted to fight anyone, we made huge offers to Vargas, Broner but the fact is none of them wanted to fight them so hes had to look up against the most feared fighter in the world. It hasnt really sunk in how good a fight this is, its two of the best fighters in the world, pound for pound. Im over the moon.