TWO-TIME former world champion Billy Dib insists Amir Khan is well past his best as he looks to cause a major upset in the Middle East.

The Australian takes on the Bolton star in Jeddah, Saudi Arabia tonight as officials in the Gulf state look to make their mark in the boxing world.

The 33-year-old is jumping up from super-featherweight to face Khan for the WBC International welterweight title having stepped in as a late replacement for initial opponent Neeraj Goyat.

None of that fazes the Sydney native though who is confident he's catching Khan at just the right time.

"This is a one-off fight at welterweight for me and Amir Khan is absolutely the right guy for me to fight,’ said the veteran of 52 fights across a 15-year career.

"Put it this way, you’d have to offer me a ridiculous amount, well into eight figures, to step into a ring with Manny Pacquiao. Your health is everything. But Amir Khan certainly isn’t Manny Pacquiao.

"Look, Amir definitely was a great champion, a proven warrior who’s made his mark on the game.

"He could be a future Hall of Famer. In time, I hope the boxing world will fully appreciate his skillset. 

"But in the past few years there’s been a major decline, a lot of chinks have emerged. He’s no longer the fighter who schooled the likes of Devon Alexander and Marcos Maidana.

"Today, he’s fighting for different reasons - money!"

Dib has raised a few eyebrows by moving up three weight classes for the fight but believes it will suit him down to the ground.

"For the first time in my boxing career, I’ve not needed to worry about my weight," he said. 

"I’ll be far stronger, more thickset and hopefully I’ll carry my speed up cos I’m quick, too.

"Everybody knows I’m a quality body puncher and I’ll be bringing even more strength and power.

"I’ll definitely test Khan. I really fancy my chances.

"But I know that if I don’t bring my absolute A game, I’ll get exposed.

"I expect it to be a stylish fight rather than a war. Amir’s the naturally bigger man so I’ll need to box out of my skin."