The 1966 open was the first to be held over four days and the first to finish on a Sunday. Arnold Palmer made his debut in the event and won by 5 strokes from Kel Nagle. Peter Thomson won his second open in 1967, the first Australian winner since 1961. He won by 7 strokes from Col Johnston. Jack Nicklaus won for the second time in 1968, beating Gary Player by a stroke after making a birdie-3 at the final hole. The 1968 open was sponsored by a local TV company, the first open to be sponsored. From 1969 the event was sponsored by Qantas. In difficult conditions, Player had a final round 77, but still won his 5th title in 1969, equalling Ivo Whitton's record. In 1970 Player led by 8 strokes after three rounds and, despite a last round 74, won by 3, for his 6th win in the event. In 1971 the open was held in Tasmania for the only time, at Royal Hobart. Nicklaus had a 9-stroke lead after three rounds and won by 8 shots. In 1972 there was an 18-hole playoff after a tie between Peter Thomson and David Graham. Graham drove out-of-bounds at the first hole and Thomson took a three-stroke lead after making a birdie. Thomson eventually won by 6 strokes for his third title. J. C. Snead won in 1973, by two strokes from Jerry Breaux, a little-known American. In 1974 Player won his 7th title. Leading by 5 strokes at the start of the final round, he scored 73 and won by 3.