Khan sat nearby Brook as the Brits watched Tony Bellew take on Oleksandr Usyk in the last fight of his career on November 10 at Manchester Arena.
The pair had been undergoing talks through their promoter Eddie Hearn, seeking to shake hands on a huge domestic bout.
British boxing fans have been longing for a Khan vs Brook match-up for years, and progress was made this year when Khan signed with Hearn’s promotional company Matchroom Sport.
Brook reluctantly agreed to cut down to welterweight in order to make the fight, but Khan’s wish of a rehydration clause was deemed one stipulation too far by the naturally-bigger Yorkshireman.
As a result of the stalled talks, Brook was lined up a fight against Michael Zerafa, who he faces in Sheffield tonight after nine months out of the ring.
Amid protracted negotiations, Khan and Brook have exchanged some choice words on Twitter, but Khan claimed that their chat at Usyk vs Bellew last month was reasonably amicable in comparison.
“I said to him: ‘If you want the fight we need to talk, and you need to sit down with me. Let’s make the fight happen,’” Khan told Express Sport.
“This is before the offer came from another fighter. So I was happy to do everything then, but he was playing games.
“So I said: ‘If you’re going to complain with the weight, the fight might not happen.’”
The other fighter Khan cites is Terence Crawford – the WBO welterweight world champion who Khan is considering an offer from.
Hearn is keen for his fighter to take on Brook, however, which would represent a bigger payday than facing the undefeated, pound-for-pound king Crawford.
As for Khan’s rivalry with Brook, the former super lightweight world champions claims he does not feel any real animosity towards the 32-year-old.
“He’s talking sh*t on Twitter but never face-to-face,” Khan adds.
“He sh*ts himself a little bit. I don’t have a problem with him, I just think the guy is a bit confused.”