When tennis phenom Cori “Coco” Gauff was 10, her best friend asked her in a video what she dreamed about the night before. “I dreamed that me and my parents drove a golf cart to the moon,” she said, shrugging her shoulders as if to have no clue what the dream meant.You can never be sure, but Cori’s dream seemed to foreshadow the make-believe stuff of her real-life journey. Knowing nothing about tennis, her parents quit their jobs to launch her career when she was 6. They became a “no-income family,” as they put it, which made it impossible...