sentences:  Nevertheless, except for the 1969 and 1971 tournaments, many of the best players missed this championship until 1982, because of the remoteness, the inconvenient dates (around Christmas and New Year's Day) and the low prize money.In 1970, George MacCall's National Tennis League, which employed Rod Laver, Ken Rosewall, Andrés Gimeno, Pancho Gonzales, Roy Emerson and Fred Stolle, prevented its players from entering the tournament because the guarantees were insufficient.The tournament was won by Arthur Ashe.