Roy Jones Jr is on BoxNation this weekend when he faces Swansea’s former WBO cruiserweight champion Enzo Maccarinelli.

The American is one of the best boxers the world has seen and still has ambitions at the age of 46.

‘Big Mac’, who is an occasional BoxNation pundit believes he can produce an upset and book another world title shot for himself.

Here are six points to debate ahead of the 12 round battle.

HOW MUCH HAS JONES GOT LEFT?

Jones isn’t the force he was particularly during his light-heavyweight pomp when he looked untouchable at times.

Over the last few years he has still chalked up wins - with eight victories on the spin since a KO defeat against Denis Lebedev.

There are plenty of decent cruiserweights he can still beat even if his true glory days can never be recaptured.

IS JONES AN ALL-TIME GREAT?

His legacy has been setback with defeats over recent years, but nobody should forget his first 50 fights where the only defeat was a disqualification loss to Montell Griffin in March 1997 that he avenged inside a round five months later.

Jones world title reigns at super-middleweight and light-heavyweight were magnificent and he is among the greatest champions from those divisions.

It is also worth remembering his did jump two division to challenge and defeat John Ruiz in a WBA heavyweight title fight in March 2003.

He is a great for what he achieved at 168lb and 175lb.

DOES MACCARINELLI HAVE THE POWER TO KO JONES?

Like all punchers, Enzo can be hurt with all seven defeats coming inside the distance.

But, with 32 KOs in 40 winning fights, Maccarinelli is capable of putting out anybody’s lights if he lands clean.

Maccarinelli is often in dramatic fights, and if he lands one of his spiteful shots on Jones’ chin this week it could all be over.

DOES JONES STILL HAVE THE MOTIVATION

He is talking a good fight, and insists that once he finally becomes a five-weight world champion by winning a cruiserweight belt he will finally call time.

This weekend’s clash will be 71st professional fight and fourth contest on 2015 so something must make him want to fight on.

One thing, Maccarinelli will not lack is motivation and can pounce if Jones goes into the bout uninspired.

COULD ENZO FREEZE IN ROY’S ‘BACKYARD’?

Jones is very much the home fighter and earlier bizarrely this year took out Russian citizenship and now spends a lot of time there.

One thing about Enzo, is his fearlessness and it is worth remembering that on a previous trip to Russia in April 2010 ‘Big Mac’ was expected to lose a European title fight against Alexander Kotlobay, but triumphed in 135 seconds.

WHO WINS?

Most people will fancy Jones to win on points, but a fabulous upset is on the cards.

At 46, Jones hasn’t fought a decent name since losing to Denis Lebedev back in May 2011 and Maccarinelli is better than anybody he has fought since.

It would be no shock if the Welshman sprung an upset when Jones feels his power.