Calzaghe and Jones Jr were set to fight in New York

Joe Calzaghe's planned September super-fight with Roy Jones Jr in New York has been postponed.

Calzaghe's camp confirmed to BBC Sport that the unbeaten Welshman has injured his right hand in training and will not be ready in time.

It was announced last week that the 36-year-old was to meet American great Jones Jr at New York's Madison Square Garden on 20 September.

A new date for the light-heavyweight clash has yet to be decided.

But Calzaghe's father and trainer Enzo told BBC Radio 5 Live he was optimistic that the bout could be rescheduled for later this year.

"Hopefully there's a suggestion the fight could well ahead in November," he said.

"It's only been rescheduled, they will fight each other. They want it, TV wants it - the whole planet wants it.

"I'm absolutely gutted, but I've always said it has to be safety first. I'm never going to be a guy who puts a fighter in there and sees him lose and then turns around and says 'I shouldn't have done it'."

Jones Jr said in an email statement: "I don't want him to be no less than his best so if this what it takes for that, then so be it."

John Wirt, the chief executive of Jones Jr's promotional company Square Ring, agreed that the fight should take place in November.

"That works for them, so the injury must be something they feel will heal sufficiently by then," he said.

"Roy is disappointed but he's looking forward to the fight being rescheduled.

"But this may be a blessing in disguise because it gives us more time to promote the fight. We were under the gun putting everything together quickly."

The bout was due to be Calzaghe's first self-promoted showdown since his split from his long-term manager Frank Warren.

But BBC Radio 5 Live's Mike Costello says the postponement is not just down to injury.

"There is talk that it's a hand injury suffered by Calzaghe, and he's had many such problems in the past," he said, "but there have also been logistical snags regarding the date of this promotion and the television scheduling in the UK.

606: DEBATE This is a true sign that Calzaghe is just about done with his career herby08

"Nor does it allow Calzaghe the amount of time - the three months - that he normally allocates to preparing for a fight.

"And it's worth remembering also that there's been no formal announcement of the fight in the shape of a press conference here, or in the US, so we're talking really about a fight that looks as if its off before it was ever officially on."

Calzaghe's injury is the latest in a series of hand problems.

The two-weight world champion fought through the pain of a hand injury to demolish Jeff Lacy to unify the IBF and his WBO crown in March 2006.

Calzaghe impressed on his American debut as he came back from a first round knock-down to beat Bernard Hopkins in Las Vegas in April.

The Jones Jr clash was set to be Calzaghe's last before the Newbridge fighter retires from his 15-year professional boxing career.

Calzaghe, unbeaten in 45 bouts, was king of the super-middleweight division - holding the WBC, WBA and WBO titles - but The Ring light-heavyweight crown he won by beating Hopkins was to be on the line against four-weight world champion Jones.