A "perfect" Wladimir Klitschko says he'd be happy to fight in Australia and his trainer believes it's time for the quadruple world heavyweight boxing champion to take his show around the globe.

Klitschko (62-3) was far too good for 34-year-old Queenslander Alex Leapai (30-5-3) in Oberhausen, Germany, scoring three knockdows in a one-sided defence of his four world titles which he ended with a fifth round knockout.

Unbeaten over 20 fights in the last decade, the giant Ukranain has had around three quarters of his fights in Germany, but isn't averse to fighting elsewhere, including Australia.

However, with Leapai defeated, newly-crowned Commonwealth champion Lucas "Big Daddy" Browne would seem to be the only credible Australian opponent. At 193cm tall, the ex-cage fighter would at least be closer in height and reach.

Banks said 38-year-old Klitschko had spoken about fighting in more countries.

"Let's go to New Zealand, let's go to Australia, let's go to South Africa, let's go everywhere," Banks said.

"It's the world titles. This is the world championship. Let's travel the world for the next year and a half or two years.

"I want to see everybody in the world to recognise this talented man.

The issue for Klitschko is not so much where he fights, but whether there is anyone out there capable of really challenging him.

The fact that 42-year-old former world champion Shannon Briggs was pushing his case over the past week underlines the paucity of talent in the division.

"The biggest challenge is myself to be honest," Klitschko said.

"Because it takes a lot of strength to stay focused and not get cocky and get big headed because you are a champion for many years."

Klitschko's elder brother Vitali, who relinquished the WBC title to pursue a political career in their stife-torn homeland, is convinced his younger sibling is untouchable.

"With age, with experience, with athletic preparation, nobody can compare to Wladimr, nobody can beat him," Vitali Klitschko said.

"I know he is one of the best athletes in the world.

"If he can fight like today he has huge potential for many years."

Vitali said he would love to see Wladimir bring the WBC belt back to the family by challenging the winner of next month's fight for that vacant title between Chris Arreola and Bermane Stiverne.