While he might have only just celebrated his 29th birthday, the best is still to come for WBO, WBA and IBF heavyweight champion Anthony Joshua says promoter Eddie Hearn.
Speaking ahead of Sky Sports’ Boston Blockbuster show, scheduled for Sunday morning, Hearn said that undefeated Joshua has beaten all before him and will only get better:
"You have to say with the amount of fights Joshua's had, he's been absolutely faultless. We couldn't have asked for a better progression," Hearn told Sky Sports.
"We jumped into the world title scene a lot quicker than anticipated, after 16 fights.
"One of the toughest things in his career so far is having to learn on the job at that level, particular against Wladimir Klitschko, Joseph Parker and Povetkin.
"He's three or four fights away from being in his prime. Right now, he is probably a year or two away from his peak in the sport."
Scary stuff - Joshua has been absolutely unstoppable and all at less than 100 per cent.
"What I want his legacy to be, which is something he shares, is to be one of the greatest heavyweights of all time, to be the undisputed champion is the ultimate goal," Hearn continued.
"We are starting the conversations now, I don't want to wait and start from scratch on December 1 as then we'd be under pressure, I want to get a feel now and see what deal Wilder's team may accept and then we can get somewhere close.
Hearn's comments really do make for ominous reading if you happen to be one of Joshua's future opponents.
If what Hearn has had to say rings true, then it really is exciting to see just how good Joshua can be.
However, it may have sent a shiver down the spine of certain heavyweights out there to learn that Joshua still has plenty of improving to do.
While ‘AJ’ is undefeated, with 21 knockouts from 22 fights (only once going the distance, with New Zealand’s Joseph Parker), many feel that his team have played it relatively safe with their selection of fights.
And this might be highlighted by the fact that most eyes will be on December's upcoming showdown between WBC champion Deontay Wilder and former ‘lineal’ heavyweight champ, Tyson Fury, who are both also undefeated.
Whether Joshua has been held back or not, it is clear that some big fights await, and with three undefeated heavyweight titans, all with a legitimate claim to the heavyweight throne, there can be little doubt that heavyweight boxing is moving into an exciting era.