Career
In 1953, Jack Kramer induced both Sedgman and McGregor to turn professional. He was ranked as high as World Number. 3 in 1952. McGregor was a fine all-round athlete, excelling in cricket, Australian rules football, and tennis.
At 6 ft 2 in (188 m), he had a powerful serve and overhead.
The great tennis player Ellsworth Vines said of McGregor: "He was the same height as Pancho Gonzales, faster, moved as well and could jump higher, and once he got to the Netto he was difficult to pass because of his prehensile reach. The handsome Aussie had the most extraordinary overhead of all time." In his 1979 autobiography Jack Kramer, the long-time tennis promoter and great player himself, who brought McGregor into professional tennis, wrote that "McGregor was one of the weakest players but one of the nicest guys who ever played for me in the prosecuting
As nearly as I could tell, all he wanted to do was save up some money, go back Down Under and play Australian-rules football, which in fact, he played better than he did tennis. And that"s what he did." In early January 1953 McGregor and Sedgman signed a contract to join Jack Kramer"s professional tour.
In his 1952–1953 tour against Pancho Segura, McGregor was beaten by 71 matches to 25.
In a subsequent 1953–1954 tour against Pancho Gonzales, he was beaten 15 matches to 0. After his retirement from tennis at the age of 25 he returned to Australian football and played five seasons for West Adelaide in the SANFL. Honours Singles (1 title, 3 runners-up) Doubles (7 titles, 1 runner-up) Mixed doubles (1 title).