- Sep 2 US Open first Grand Slam tournament tiebreak is used to decide a set at 6-6; first player to reach 5 points with sudden death at 4-4
- Sep 3 After playing a NL record 1,117 consecutive MLB games, Chicago Cubs outfielder Billy Williams asks to sit out
- Sep 7 White Sox use record 41 players in doubleheader & lose both games
- Sep 9 Feyenoord wins soccer's Club World Cup
Sports History
Sep 9 MLB Commissioner Bowie Kuhn suspends Detroit Tigers pitcher Denny McLain for carrying a gun
US Open Women's Tennis
Sep 12 US Open Women's Tennis, Forest Hills, NY: Margaret Court of Australia completes Grand Slam; beats American Rosemary Casals 6-2, 2-6, 6-1
- Sep 13 New York City Marathon: inaugural event won by Gary Muhrcke in 2:31:38
US Men's Tennis Open
Sep 13 US Open Men's Tennis, Forest Hills, NY: Ken Rosewall wins second US title; beats fellow Australian Tony Roche 2-6, 6-4, 7-6, 6-3; first major in which tiebreak used to decide sets at 6-6