US Men's Tennis Open
Sep 6 World #1 tennis player Novak Đoković is sensationally disqualified in 4th round of US Open after hitting a ball in frustration, striking a line judge; trailed Pablo Carreño Busta 5-6 in 1st set
- Sep 7 Tour Championship, Men's Golf, East Lake GC: Dustin Johnson wins by 3 strokes from Xander Schauffele & Justin Thomas; claims FedEx Cup, equal biggest winner's prize in golf, US$15m
US Open Women's Tennis
Sep 12 US Open Women's Tennis: Naomi Osaka of Japan wins her second US title; beats Victoria Azarenka of Belarus 1-6, 6-3, 6-3
- Sep 13 ANA Inspiration Women's Golf, Mission Hills CC: Mirim Lee of South Korea wins her first major title; beats Brooke Henderson and Nelly Korda with a birdie on first playoff hole
- Sep 13 Chicago Cubs pitcher Alec Mills no-hits the Milwaukee Brewers, 12-0 at Miller Park, Milwaukee
US Men's Tennis Open
Sep 13 US Open Men's Tennis: Austrian Dominic Thiem becomes first in 70 years to recover from 2 sets down to win US crown; beats Alexander Zverev of Germany 2-6, 4-6, 6-4, 6-3, 7-6
- Sep 20 107th Tour de France: Slovenian Tadej Pogačar claims yellow jersey from countryman Primož Roglič; also wins mountains and U25 classifications; green jersey, Sam Bennett
- Sep 20 US Open Men's Golf, Winged Foot CC: American Bryson DeChambeau claims his first career major title as the only player to score under par; wins by 6 strokes from Matthew Wolff
- Sep 28 Stanley Cup Final, Rogers Place, Edmonton, Alberta: Tampa Bay Lightning claim second championship in franchise history with a 2-0 Game 6 win over Dallas Stars; win series 4-2
Ben Ainslie Sails to Gold
Sep 29 Ben Ainslie wins the Olympic gold medal in the Laser class, beating previous Laser Olympic champion Robert Scheidt
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