Re: Best three year span ever
You have certainly picked out the best three-year stretches of the Open Era, but the older players should not be overlooked. It is difficult to 'quantify' a great season, or string of seasons, before the 1970s. Nevertheless, I would add the following to your list, which include sensational years by amateur players, dominant campaigns by the early professionals, and in Laver's case, still the finest single season of the Open Era (1969). Perhaps others will have even more to add.
BILL TILDEN, 1923-25. Did not lose a single important match, winning the U.S. Championships and leading the U.S. Davis Cup team to victory each year; in 1925, he won an astonishing 57 straight games.
FRED PERRY, 1934-36. Won seven major championship titles in three years; after a loss at the French Championships denied him the Grand Slam in 1934, he rebounded in '35 by winning the difficult French/Wimbledon double; became the first man to win Wimbledon in three consecutive years after the abolition of the Challenge Round, a feat not duplicated until Borg's five straight in 1976-80.
DON BUDGE, 1937-39. Won Wimbledon, U.S. Championships in 1937 and led U.S. to legendary Davis Cup semifinal victory over Germany and Von Cramm; topped himself in '38 by winning first-ever Grand Slam; won the Wimbledon singles, doubles, and mixed doubles in two straight years, the only man in tennis history to hold this record; turned pro in '39 and defeated both reigning pros, Vines and Perry, to prove that he was definitively the number one player in the world.
JACK KRAMER, 1947-49. In 1947, defended U.S. Championships crown and lost the fewest games ever on his way to the Wimbledon title; lost only three matches in two years, finishing amateur career with a 41-match win streak; turned pro in late '47 and toppled reigning king Riggs in '48; began a long tour in '49 where he crushed the young challenger, Pancho Gonzales.
ROD LAVER, 1967-69. Utterly dominant on pro tour in 1967, winning all the major pro events; won first open Wimbledon and ranked number one in '68; crowning achievement of his career came in in '69 with his second Grand Slam, the only one by a male player in the Open Era.