Carlos Alcaraz, 19, wins US Open to become youngest world No. 1 in men's tennis history
NEW YORK — Carlos Alcaraz used his combination of moxie and maturity to beat Casper Ruud 6-4, 2-6, 7-6 (1), 6-3 in the US Open final on Sunday to earn his first Grand Slam title at age 19 and become the youngest man to be ranked No. 1.