 It was the 89th staging of the tournament, and the fourth Grand Slam tennis event of 1969.It was the last year at the US Open in which sets were decided by a two-game advantage before the introduction of the tiebreak in 1970.This championship was the first time in grand slam history that two multiple slam sets were accomplished in two different disciplines; Rod Laver won his first multiple slam set in Men's Singles, and his fellow countryman Ken Rosewall won it for the first time in the Men's Doubles.