![The US Open introduced the tiebreak set 50 years ago today - Official Site of the 2022 US Open Tennis Championships - A USTA Event The US Open introduced the tiebreak set 50 years ago today - Official Site of the 2022 US Open Tennis Championships - A USTA Event](https://photo-assets.usopen.org/images/pics/large/f_OpenCover_1971.jpg)
The US Open introduced the tiebreak set 50 years ago today - Official Site of the 2022 US Open Tennis Championships - A USTA Event
US Open Tennis on Twitter: "HISTORY: #Konta d. No. 9 #Muguruza, 7-6, 6-7, 6-2 in longest women's match since #usopen introduced tiebreak (1970). http://t.co/epaaK8VlNi" / Twitter
![50 for 50: Ken Rosewall, 1970 men's singles champion - Official Site of the 2022 US Open Tennis Championships - A USTA Event 50 for 50: Ken Rosewall, 1970 men's singles champion - Official Site of the 2022 US Open Tennis Championships - A USTA Event](https://photo-assets.usopen.org/images/pics/large/f_Rosewall_50th.jpg)