Precocious heavyweight talent Moses Itauma was putting Britain’s best boxers on notice way before he turned over as a professional.At just 16-years-old, the Chatham southpaw is said to have caused former WBC cruiserweight champion Lawrence Okolie serious problems in sparring.Itauma is the most exciting prospect in heavyweight boxingGettyThat is according to Olympian Anthony Fowler, who claims Itauma rocked up to Shane McGuigan’s Gym in his school uniform before winding Okolie with a sickening body shot. “I walk in the gym and there’s a kid there in a f****** school uniform, I thought he was half-lost,” Fowler told BoxingScene.“So I get up and say, ‘What are you here for?’ He went, ‘Sparring.’ I went, ‘Who are you sparring with?’ And he went, ‘Lawrence.’ I said, ‘How old are you?’ “He went, ‘16.’ I thought, ‘F****** hell, God bless you, mate.’ Lawrence can punch hard, he’s a big, strong fella, he’s massive.“Lawrence was sparring three lads. So Lawrence sparred the first two lads and then Moses jumped in fresh, and Lawrence had done six rounds already, so he was a bit tired. “This kid just went forward the whole spar, throwing bombs. “I think he half-winded Lawrence with the left hand to the body.“He was relentless for three rounds on him, throwing non-stop punches. No one could believe it in the gym. “Everyone said, ‘What the f***?’ Because obviously, Lawrence was not in control. “He was a world champion; he’s normally in control of his sparring partners. GettyItauma is said to have winded Okolie in sparring when he was 16[/caption]“So when this lad was like, this young boy, who was really on it, I was like, wow.”Two years after his spar with Okolie, Itauma signed a professional contract with Frank Warren‘s Queensberry Promotions. The 20-year-old has gone on to have a faultless 12-0 start to life in the paid ranks and is now set to take his biggest step up to date in his next fight.On August 16 in Riyadh, Saudi Arabia, Itauma will meet former world title challenger Dillian Whyte.Provided he comes through his next outing unscathed, Saudi boxing chief Turki Alalshikh is eyeing a cross-generational clash between him and current undisputed heavyweight champion Oleksandr Usyk.However, it seems more likely that Joseph Parker will land the title shot, given that he has been ordered by the WBO to box the Ukrainian next.