Inducted into the Australian Tennis Hall of Fame in 2000; inducted into the International Tennis Hall of Fame in 1999.
Winner of nine titles, McGregor completed the doubles Grand Slam in 1951 with compatriot Frank Sedgman. The pair won seven consecutive majors together from 1951 to 1952 - a feat that has never been equalled.
McGregor was a tall, strong serve and volleyer who was a surprise selection in Australia's 1950 Davis Cup team. The selection was proved correct when McGregor won his first singles rubber and helped the Australians to victory over the Americans.
Between 1950 and 1952 McGregor made the final of the Australian championships, winning it once in 1952 when he beat his doubles partner, Sedgman. McGregor retired from tennis at 25 to play Australian Rules Football, playing five seasons for West Adelaide in the SANFL.