![Rafael Nadal of Spain sits as rain stops his second set tie-break against Fernando Gonzalez of Chile during their quarter-final evening match at the U.S. Open tennis tournament in New York, September Rafael Nadal of Spain sits as rain stops his second set tie-break against Fernando Gonzalez of Chile during their quarter-final evening match at the U.S. Open tennis tournament in New York, September](https://c8.alamy.com/comp/2E81XKK/rafael-nadal-of-spain-sits-as-rain-stops-his-second-set-tie-break-against-fernando-gonzalez-of-chile-during-their-quarter-final-evening-match-at-the-us-open-tennis-tournament-in-new-york-september-10-2009-reutersshaun-best-united-states-sport-tennis-2E81XKK.jpg)
Rafael Nadal of Spain sits as rain stops his second set tie-break against Fernando Gonzalez of Chile during their quarter-final evening match at the U.S. Open tennis tournament in New York, September
![For any newcomers to the sport, here's a quick breakdown of the different rules regarding deciding sets at the four Grand Slams. Courtesy of Tennis TV. : r/tennis For any newcomers to the sport, here's a quick breakdown of the different rules regarding deciding sets at the four Grand Slams. Courtesy of Tennis TV. : r/tennis](https://preview.redd.it/9g6q4ktv3xc41.jpg?auto=webp&s=a09427a9150fac4e2844b1243789e51dc17b061c)
For any newcomers to the sport, here's a quick breakdown of the different rules regarding deciding sets at the four Grand Slams. Courtesy of Tennis TV. : r/tennis
![US Open tennis 2021 - Relentless Alexander Zverev downs Lloyd Harris to reach semi-finals - Eurosport US Open tennis 2021 - Relentless Alexander Zverev downs Lloyd Harris to reach semi-finals - Eurosport](https://imgresizer.eurosport.com/unsafe/1200x0/filters:format(jpeg):focal(952x355:954x353)/origin-imgresizer.eurosport.com/2021/09/08/3215603-65867328-2560-1440.jpg)
US Open tennis 2021 - Relentless Alexander Zverev downs Lloyd Harris to reach semi-finals - Eurosport
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Does the Australian Open have a fifth set tie-break? US Open, French Open and Wimbledon final setup rules - The Sun - USTimeToday
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Wimbledon tennis tie-break rules explained: How new final-set decider for 2019 works | London Evening Standard | Evening Standard
![Dan Evans wins fifth set tie-break to seal comeback against Alexei Popyrin | US Open Tennis 2021 | The Guardian Dan Evans wins fifth set tie-break to seal comeback against Alexei Popyrin | US Open Tennis 2021 | The Guardian](https://i.guim.co.uk/img/media/30757a57ca35f5f77d245012c4680c929bf94ba5/0_115_3341_2004/master/3341.jpg?width=465&quality=45&auto=format&fit=max&dpr=2&s=9924933a6d8c74bc4bad798b99b79571)
Dan Evans wins fifth set tie-break to seal comeback against Alexei Popyrin | US Open Tennis 2021 | The Guardian
![US Open exclusive: Five of the best fifth-set tiebreaks in history - Official Site of the 2021 US Open Tennis Championships - A USTA Event US Open exclusive: Five of the best fifth-set tiebreaks in history - Official Site of the 2021 US Open Tennis Championships - A USTA Event](https://photo-assets.usopen.org/images/pics/large/f_USTA1043572_20180904_Day9_GE2_6530.jpg)
US Open exclusive: Five of the best fifth-set tiebreaks in history - Official Site of the 2021 US Open Tennis Championships - A USTA Event
![We Are Tennis on Twitter: "It was sure: this final is ending with a tie break! #USOpen https://t.co/iwPS2KO32g" We Are Tennis on Twitter: "It was sure: this final is ending with a tie break! #USOpen https://t.co/iwPS2KO32g"](https://pbs.twimg.com/media/Eh1ZHxYXcAIE0xD.jpg)