![US Open Tennis on Twitter: "On this day in 2001, 20-year-old 🇦🇺 @lleytonhewitt became the youngest World No. 1 in the history of the @atptour rankings. Hewitt won six titles that season, US Open Tennis on Twitter: "On this day in 2001, 20-year-old 🇦🇺 @lleytonhewitt became the youngest World No. 1 in the history of the @atptour rankings. Hewitt won six titles that season,](https://pbs.twimg.com/media/EnHUgQjVQAMVmaT.jpg)
US Open Tennis on Twitter: "On this day in 2001, 20-year-old 🇦🇺 @lleytonhewitt became the youngest World No. 1 in the history of the @atptour rankings. Hewitt won six titles that season,
![Full Match Video: Andre Agassi vs. Mike Bryan, 2001 US Open men's singles first round - Official Site of the 2023 US Open Tennis Championships - A USTA Event Full Match Video: Andre Agassi vs. Mike Bryan, 2001 US Open men's singles first round - Official Site of the 2023 US Open Tennis Championships - A USTA Event](https://photo-assets.usopen.org/images/pics/large/f_Agassi-backhand.jpg)
Full Match Video: Andre Agassi vs. Mike Bryan, 2001 US Open men's singles first round - Official Site of the 2023 US Open Tennis Championships - A USTA Event
![Torneo internazionale di Tennis ITF Combined 2001 Team - Città di Padova - memorial Lino Barbieri dal 7 al 14 agosto 2022 Torneo internazionale di Tennis ITF Combined 2001 Team - Città di Padova - memorial Lino Barbieri dal 7 al 14 agosto 2022](https://www.padovaoggi.it/~media/horizontal-hi/27278494956952/296162577_5391780314249932_3111074192168275847_n-2.jpeg)
Torneo internazionale di Tennis ITF Combined 2001 Team - Città di Padova - memorial Lino Barbieri dal 7 al 14 agosto 2022
![50 for 50: Lleyton Hewitt, 2001 men's singles champion - Official Site of the 2023 US Open Tennis Championships - A USTA Event 50 for 50: Lleyton Hewitt, 2001 men's singles champion - Official Site of the 2023 US Open Tennis Championships - A USTA Event](https://photo-assets.usopen.org/images/pics/large/f_LleytonHewitt.jpg)