Spanish teenager Carlos Alcaraz became a first-time Grand Slam champion and world number one by beating Casper Ruud in the US Open final to achieve both feats. The 19-year-old Alcaraz won 6-4 2-6 7-6 (7-1) 6-3 in his first major final. Alcaraz’s victory in four sets against Casper Ruud puts him top of the rankings