As she enters the US Open within touching distance of a historic grand slam, Serena Williams’s complex relationship with the American public comes full circle on the Flushing Meadows courts where her legend was bornShe arrived just after noon on Thursday to a standing-room-only throng of press that had gathered in the main interview room below Arthur Ashe Stadium, clad in a navy T-shirt and gray sweats after a morning on the practice courts.