Anthony Joshua dismissed concerns he has been hurt in sparring by claiming his black eye was down to his physio.
Joshua was sporting the injury in New York as he finalises his preparations for the latest defence of his world titles against Andy Ruiz Jr on Saturday.
But he denied he has taken punishment in the ring during his training camp.
"That was just physio stuff really," he told Seconds Out . No-one really does that to me in sparring and stuff like that. So that was just more physio stuff; like rehabilitation, recovery."
Joshua finished his training in Miami ahead of his US debut this weekend.
Previously the 29-year-old had consistently remained in the UK, where he has always fought, but on the occasion of his US debut his approach has changed.
That he developed his own purpose-made gym instead of using one of those that already exists also suggests that he is likely to do so again in future, similarly to a peak David Haye.
Joshua also revealed the many mental benefits involved after the frustration that came with the withdrawal of Jarrell Miller.
The Olympic gold medallist said: "I can see why people go away for training camps, because you do need to have a solitary mind.
"I've a social mindset, so it's good. The system I've used over the last nine years, I'm not complaining about, but it's been different, it's been good. It's something we can definitely implement more in future training camps.
"The sun, the vitamin D, (in Miami) is good for me. The focus is good, and maybe fighting away from home gives you that world championship mindset, like I'm fulfilling destiny.
"This is a step up for me. It's a new experience; travelling, new time zone, setting up a training camp away from home. All of that stuff is really important."
