![Serena Williams of the U.S. serve speed of 207 km per hour (129 mph) is seen behind Ayumi Morita of Japan during their women's singles match at the Australian Open tennis tournament Serena Williams of the U.S. serve speed of 207 km per hour (129 mph) is seen behind Ayumi Morita of Japan during their women's singles match at the Australian Open tennis tournament](https://c8.alamy.com/comp/2CXARJK/serena-williams-of-the-us-serve-speed-of-207-km-per-hour-129-mph-is-seen-behind-ayumi-morita-of-japan-during-their-womens-singles-match-at-the-australian-open-tennis-tournament-in-melbourne-january-19-2013-reutersdavid-gray-australia-tags-sport-tennis-tpx-images-of-the-day-2CXARJK.jpg)
Serena Williams of the U.S. serve speed of 207 km per hour (129 mph) is seen behind Ayumi Morita of Japan during their women's singles match at the Australian Open tennis tournament
![US Open: Week 1 by the numbers - Official Site of the 2022 US Open Tennis Championships - A USTA Event US Open: Week 1 by the numbers - Official Site of the 2022 US Open Tennis Championships - A USTA Event](https://photo-assets.usopen.org/images/pics/large/f_USTA1032043_20180829_Day3_P5S_0511.jpg)
US Open: Week 1 by the numbers - Official Site of the 2022 US Open Tennis Championships - A USTA Event
![Atlanta native Alycia Parks ties Venus Williams for fastest US Open serve - Official Site of the 2022 US Open Tennis Championships - A USTA Event Atlanta native Alycia Parks ties Venus Williams for fastest US Open serve - Official Site of the 2022 US Open Tennis Championships - A USTA Event](https://photo-assets.usopen.org/images/pics/large/f_20210830_USO_Day1_PS6_0996b.jpg)