Rod Laver

Rod Laver is the only player to win the calendar-year Grand Slam twice, achieving it first as an amateur in 1962 and again in 1969 during the Open Era — a gap of seven years unmatched by anyone on this list. His second Slam arrived despite being banned from majors for five years at his peak, costing him roughly 8 to 10 additional titles. Laver's 200 career singles titles, including 11 majors, surpass the average of 8 for top-10 all-time players. His dominance over rivals like Roy Emerson included a 7-3 head-to-head advantage, demonstrating a win rate faster than the typical great of his era. In 1969 alone, he won 31 of 38 tournaments, a 82% victory rate that outperforms #5 Steffi Graf's yearly averages.