I am always attracted to the edges because they define shape and give context. And I always seek a spark of photographic magic on the edges of light and shadow. So when I was tasked to cover the opening days of the United States Open this year, I found myself looking to the margins of both the action and the light as the world’s premier players performed an exquisitely elegant dance of athleticism and grace with the assistance of an army of support: ball boys and ball girls, line judges and members of the security staff, working in view of a sea of awe-inspired fans, myself included.