Anthony Joshua is fortunate to have been given the opportunity to fight for IBF world title, but that does not mean he is ready to take it.
Under normal circumstances, Joshua, 26, would be approaching the peak of his career. However, having not taken up boxing until the relatively late age of 18, he has just 15 fights under his belt. Admittedly, all 15 of those have ended in knockout victories, but Martin's record of 24 fights and 21 knockouts could give him the edge.
His promoter, Eddie Hearn, has perhaps been protecting him so far, as he is yet to fight anyone of Martin's quality. That has led to concerns that his title shot has come too early in his career.
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It appears that Martin is referring to a couple of controversial moments in Joshua's Olympic campaign. The resounding feeling at the time, at least in Britain, was that Joshua was deserving of his success, but Martin has seized the opportunity to pile the pressure on his adversary.
Joshua relying on London crowd
The highly-anticipated bout is leaving bookmakers torn. Martin is more experienced, but Joshua will be hoping that fighting in London, with all the advantages of the home crowd, can pay off again.
This will be one of Joshua's most high-profile bouts yet. There is no love lost between the two fighters, with Martin's latest trash-talk dismissing Joshua's Olympic gold medal as the result of the home advantage he enjoyed at London 2012.
The 6"5 American will be up against that same problem in The 02 Arena, but in truth, he has countless other advantages over Joshua.
It is almost impossible to separate the two in terms of power; both are heavy punchers, but Martin has better speed and agility.
Defeat could be damaging
The concern in Joshua's camp will be over the effect a potential defeat could have. While Hearn and co. are in buoyant mood ahead of the fight, there must be some consideration of the damage a loss could do to his career.
By waiting another year or two, they could have limited that damage, but if things do not go Joshua's way against Martin, it will be an enormous setback to his progress.
Joshua will no doubt be spurred on by his critics, who include his compatriot, the world number one, Tyson Fury. There is no danger of Fury giving the British fighter home advantage; he has slammed his title chances, but Joshua will be desperate to prove him wrong.
If he is to fulfil his ambitions, he would have had to take this step eventually. By taking such a huge risk so early on, he has set himself up for a fall. If he were to win, though, the gamble will have paid off.
Martin will be his toughest fight yet, but a victory for Joshua would go some way towards putting criticism over his world champion credentials to bed.
Will there be a knockout in the Joshua-Martin fight? Have your say in the comments!