WASHINGTON (AP) — The biggest tennis title of Leylah Fernandez's career arrived at the D.C. Open on Sunday with the help of a terrific backhand, some superb returning — and energy courtesy of Shake Shack's burgers and fries. The left-handed Fernandez, a 22-year-old from Canada who is ranked 36th, wrapped up a big week of tight matches with a lopsided victory, defeating Anna Kalinskaya 6-1, 6-2 in the final. Fernandez earned her fourth singles trophy — all have come at hard-court tournaments — and first at a WTA 500 event.