Khan, 29, had been in talks with Brook over a massive British blockbuster fight in the summer, although stunned the boxing world when agreeing a 155 pound catchweight to battle the Mexican superstar for the WBC middleweight title.
Although ultimately disappointed in Khan’s decision to prolong a meeting between the two, Brook is convinced they can pick up where they left off at some point in the future when the dust settles on the Canelo fight.
“I don’t know if he’s cashing himself in or what but I don’t believe he thinks he can win. That’s me being honest. He’ll lose in that fight,” Brook told Sky Sports News HQ.
“They can always come back down and fight the welterweights of the world. If he’d got in with me, which we all expected, I’d definitely end his career.
“Him fighting at middleweight against Canelo, he can always say ‘the guy was too big for me. I thought this and I thought that.’ He can come up with that and drop back down so it’s win-win for Khan I think.
“It’s (our fight) always going to be on the table. It’s a good move he’s done (fighting Canelo). With the demand we still have to sit down and talk.
“As much as I’d like to say ‘get lost’, with the demand from fans all over the world, they’ll still want to see that fight,” he added.
Brook, also 29, makes a mandatory defence of his belt against Kevin Bizier next month before turning his attention to a possible unification with Keith Thurman or Danny Garcia in the summer.