Anthony Joshua believes his prolific professional career to date hasn't "scratched the surface" of what he is capable of doing in the ring, as he sets his sights on unifying the heavyweight division.
The 26-year-old makes his first world title defence at the O2 Arena against American Dominic Breazeale on June 25, where he landed his first world title belt against another American, Charles Martin, in April.
However, the Watford-born fighter admits he is capable of doing much more and aims to go on to be one of British heavyweight boxing's greatest, by unifying the division, while currently holding an unblemished record of 16 bouts - all by knockout - and no defeats.
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Joshua's performances so far have even attracted interest from the likes of David Haye, Dillian Whyte and Tyson Fury, for a big domestic fight in the near future.
However, with the Hertfordshire fighter generating interest from fighters across the globe, those plans will depend on whether the fight with continue to further the ambitious heavyweight's career.
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Speaking to The Times, as reported by Sky Sports, Joshua said: "I'm pretty satisfied with how far I've come - but I'm nowhere near where I want to be,
"Everything that's happened since turning pro has been designed to end with me as the unified heavyweight champion of the world.
"I don't feel that I've even scratched the surface of what I can achieve and that's why when I beat Charles Martin I didn't celebrate wildly because I've only had one world title fight, one world title win and one world title belt."
It took just two rounds for Joshua to knockout Martin earlier in the year, and, although Breazeale has promised to be the Brit's biggest test to date, the overwhelming majority expect Joshua to maintain his fine record and retain his IBF world title belt.
Joshua has spent time preparing for the fight later this month with Great Britain's Olympic squad, but readily admits he has a long way to go before he can realise his dream of being the unified world heavyweight champion.
"I want all the belts and I know that there is a lot of work to be done to get there, but I've got a great team behind me and I think I'll get there."
The IBF heavyweight champion also paid respect to the impact the Olympics had on his professional career, after winning gold at the London 2012 olympic games.
"London 2012 laid the foundations for what I've achieved in my pro career." Joshua admitted.
"All the support I received winning the gold medal has grown and grown since I made my debut at The O2 in 2013, and now we're selling out The O2, time and time again and the fights are getting bigger and bigger."
How far off is Anthony Joshua from unifying the heavyweight division? Have your say in the comment box below.