The day the USTA introduced the tiebreak - Tennis Majors

On this day in 1970, the USTA introduced a bold change in the scoring format of tennis, one that would be adopted across the board over the years.

ZooTennis: Tien and Hui Reach US Open Junior Finals After Long Day of Waiting; Ram and Salisbury Win Historic Third Straight Men's Doubles Title

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50 facts for the 50th anniversary of the US Open

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Holt stuns fellow American Fritz in Grand Slam main draw debut

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John Isner heads to retirement after US Open last-set tiebreaker losses in singles and doubles, Sports

New York, United States. 31st Aug, 2021. Novak Djokovic of Serbia reacts during a changeover as he falls behind to Holger Rune of Denmark during their second set tie-breaker at their first

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In men's tennis, prior to the introduction of the tie-break, (a) what is the longest set & highest score in major tournament history, and (b) who were the players? - Quora

US Open (tennis) - Wikipedia

US Open 2019 news - Matteo Berrettini outlasts Gael Monfils in five-set rollercoaster to reach semis - Eurosport