Here comes AJ. The initials are identification enough for Britain’s boxing superstar. In a windowless room in the bowels of Wembley, Anthony Joshua greets the assembled reporters with a handshake, and not the knuckle crusher beloved, for example, of Eubank and son, of Nigel Mansell, Lewis Hamilton and others in the iron-grip fraternity, rather a delicate, nothing-to-prove sort of contact. Joshua is beyond the macho gesture. Simply standing upright in a T-shirt, 20 inch, heavily pregnant biceps popping, gets that job done.