Boxing: Shane Mosley won't return to fight Mundine

American great Shane Mosley says he doesn't intend to return to Australia to fight Anthony Mundine and has labelled the country's boxing scene "behind the times'' and "almost like the mafia days''.

Mosley flew back to the US on Tuesday morning, walking out on Wednesday's scheduled fight with Mundine in Sydney, claiming a breach of contract by promoter Vlad Warton in failing to pay the remainder of his $1 million purse in advance.

The former three-time world champion said Warton was contractually obliged to pay a $700,000 upfront fee 10 days before he entered the ring.

"I waited and waited and waited and tried to let them get it, but they never got it,'' Mosley told website fighthype.com.

"Even up until the weigh-in, he still didn't have the money.''

Mundine indicated he may fly to the US with his manager Khoder Nasser in a bid to resurrect the fight.

Asked whether he was still open to fighting Mundine, Mosley said he'd rather the Australian go to America to fight him.

"I'm not thinking about going back out to Australia and messing with the time zone; I don't have time for that,'' said Mosley.

"I would rather he come out here and fight on my terms and on my turf because over there, it seems like they're still behind the times with their boxing.

"It's almost like the mafia days.

"I'm hearing that people watch the judges; they're sitting behind them looking at them while they mark their scores.

"... Their commission is not really strong like ours, so it's like anything goes. That's what I kept hearing.''

-AAP