an Entity references as follows:
Rod Laver defeated Roy Emerson 6–2, 6–4, 5–7, 6–4 in the final to win the men's singles tennis title at the 1962 U.S. National Championships, and in turn complete a Grand Slam by winning all four majors in the same year. Laver would not appear in a Grand Slam tournament again until the start of the Open Era in 1968, due to turning professional in 1963.