Spanish teenager Carlos Alcaraz fulfilled his potential as a future Grand Slam champion and world number one by beating Casper Ruud in the US Open final to achieve both feats.

Alcaraz won 6-4 2-6 7-6 (7-1) 6-3 in his first major final.
The 19-year-old is the youngest men’s Grand Slam champion since Rafael Nadal won the French Open in 2005.

Ruud, 23 years of age, would have become the new world number one if he had won, but has now lost both of his two major finals.