Daniel Stapff was once a chubby, 11-year-old tennis player from Curitiba, Brazil, the son of a former pro whose entire family lived racket-in-hand. But one day Stapff found himself bored and near a golf course. He whacked a few balls.Stapff left the course underwhelmed. Striking the tiny dimpled ball with an awkwardly shaped club was a towering task. The game was tedious to learn — and besides, Stapff's dream was to turn pro in his father’s sport.