On Monday, Ben Shalom revealed that contracts are signed for the long-awaited grudge match, which is still one of the biggest fights in British boxing history.
The British welterweight rivals have a deep-running animosity dating back to the days when they were fresh-faced amateurs learning the basics of the sweet science.
They have never been able to get in the ring together up until now, but footage from 2012 shows the pair exchanging words in the past.
During that time the Bolton 'King' was widely recognised as one of the most naturally gifted boxers of his generation. By that stage Khan had already beaten the likes of Marcos Maidana, Paulie Malignaggi and Dmitry Salita.
Brook meanwhile had yet to fight for a world title some two years before his fight against Shawn Porter.
In the clip, Khan said of Brook: "You know, Kell's a good fighter, he's got a good eye."
Sky Sports presenter Adam Smith interjected and asked Brook: "You've sparred before, haven't you?"
To which Brook replied: "We've sparred before, yeah."
Khan laughed and added: "Kell will tell you about the sparring sessions."
Brook interrupted: "And what happened?"
Khan persisted: "You know what happened Kell, you know what happened. I boxed Kell all around the ring and I'm not going to lie to you that's the God honest truth."
Brook insisted: "You got schooled."
Before Khan concluded: "I never got schooled. Listen, I was training for the Olympic Games at that time and Kell was at the juniors and I schooled Kell in the ring."
When asked if he believes Khan will be able to take his biggest punches on the chin, Brook told Johnny Nelson: "No, no, I don't believe so.
"Accuracy beats speed, we know that he can't take a shot too well.
"Accuracy beats speed and it's just a matter of time before I land one and he's gone."
When Amir Khan and Kell Brook clashed on Ringside in 2012
Check out the video below...
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