Originally Posted by JW10S
Something to keep in mind--after Laver won his first Grand Slam he turned pro and was barred from playing the Slams for 8 years while he was in his prime (the Slams were amateur events in those days). One year after Open tennis came about he won his second Grand Slam. One can only imagine how many Slams Laver would have won had he been allowed to play them. Also Emerson won most of his Slams while the best players of his day (Laver, Hoad, Rosewall, Gonzalez, etc.) were playing pro tennis and not allowed to play the Slams--thus I would not categorize him as tier 1.
Overall mostly true.
Actually 5 years from 1963-1967 inclusive. In the middle of career between grand slams.
Laver almost certainly would have won 15 or more grand slams, probably less up to 1962 (Laver benefited from absence of professionals) but would have won numerous titles during 63-67. Emerson won 10 of his 12 titles from 63-67 having lost in 3 grand slam finals in 62 to Laver; Emerson won none in the professional era of tennis.