18-year-old @AlcarazCarlos03 defeats World No. 3 Stefanos Tsitsipas in 5th-set tiebreak to reach @USOpen 4R.

Alcaraz becomes the...
* Youngest man in Grand Slam 4R since A. Medvedev, 17, at 1992 @RolandGarros
* Youngest man in #USOpen 4R since Chang, 17, and Sampras, 18, in 1989

— ATP Media Info (@ATPMediaInfo) September 3, 2021