“That Hagen had an overpowering effect in match play on some of his opponents was clear enough. His demeanour towards them, though entirely correct, had yet a certain suppressed truculence; he exhibited so supreme a confidence that they could not get it out of their minds and could not live against it. They felt him to be a killer and could not resist being killed. He had a very shrewd eye for their weaknesses and, strictly within the limits of what was honest and permissible, he would now and then exploit [it] to his own advantage.”
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Bernard Darwin, “Walter Hagen” in The Darwin Sketchbook (Writings from 1910 to 1958)