In August, King won the indoor Houston tournament and the U.S. Women's Clay Court Championships in Indianapolis. King then switched back to grass and won the US Open without losing a set, defeating Evert in the semi-finals (6–3, 6–2) and Casals in the final. King then won the tournaments in Louisville, Phoenix, and London (Wembley Pro). King and Casals both defaulted at 6–6 in the final of the Pepsi Pacific Southwest Open in Los Angeles in September when their request to remove a lineswoman was denied, eventually resulting in the United States Lawn Tennis Association fining both players US$2,500. To end the year, King played two tournaments in New Zealand but did not win either. She lost in Christchurch to Durr and in Auckland to Kerry Melville Reid.