Dib was announced as the replacement for Goyat but he proved to be an easy opponent for Amir as the Brit downed the Australian in just the second round with vicious left hook. There would be no escape in the fourth, though, as a double left hook followed up by a rapid combination saw Dib go down again and prompt the towel to be thrown.
On the Dib fight, he said he felt "very comfortable".More news: Trump Biographer Warns That the Epstein Investigation Could Ensnare the President
Billy, who got the fight last month after Indian boxer Neeraj Goyat was forced to withdraw following a vehicle crash, said, "What went wrong is that he looked bigger than what he seemed at the weighing in".
Khan was reportedly being paid £7m, £3m more than he earned against Crawford, to headline a team event between fighters representing Pakistan and India.
Khan arrived in Saudi Arabia on a mission to make a massive statement in his Middle East debut which would lure the eight-time world champion Pacquiao into a fight with him in the desert.More news: Death of wife of bounty hunter is Duane Dog Chapman - view
Khan will now watch Pacquiao take on Keith Thurman next weekend in Las Vegas, knowing he has kept up his side of the bargain in their potential deal. I think whenever I fight I always make it very exciting - the people here love a fight.
"Hopefully we come back again at the end of the year and bring Manny Pacquiao here".
"If I want to one day fight for another world title, I have to get past this fighter and I know Billy is going to come to win", Khan said earlier this week.More news: Man Allegedly Takes Car With Kids Inside, Onlookers Kill Him
"I slowed myself down a little bit instead of rushing all the time", he explained.