The pain in the lower left of his back has caused Murray discomfort since late 2011 and is the same injury which required a painkilling injection at last year's French Open.
The New York Police Department secured the area in lower Manhattan - between 51 Park Place and 50 Murray Street - as a crime scene after the aircraft piece was found.
But Blake, a place lower than the Scot in the world rankings at nine, doubts Murray would progress very far at SW19 if he is still carrying the injury.
Most in need of instruction is a new lower class, perhaps a fifth of the white population (Mr Murray excludes blacks and Latinos, simplifying his thesis by taking race out of the equation), whose plight forms the next part of his book.