The tiny (pop. 636) town of Barellan swelters in the middle of the hot wheat plains of New South Wales, Australia. The house on the edge of town is a ramshackle old weatherboard structure with peeling paint, broken-down cars in the yard and a scruffy pack of yapping mongrels constantly in earshot. The inside is something else again—a blinding panoply of glittering trophies. The house is the family home of Evonne Goolagong, 19, a shy, attractive aborigine; the trophies are for tennis, and there are unquestionably more to come.
Recently in Melbourne, Miss Goolagong pulled off one of the biggest upsets of...