The Spaniard was also the third-youngest Masters 1000 champion in Miami earlier this year and the youngest Grand Slam quarterfinalist since 1990 at the US Open. — Since Rafael Nadal, Carlos Alcaraz, 19, is the youngest player to have reached the top five in the world rankings. Despite falling just short to Lorenzo Musetti in the Hamburg European Open final, 4–6, 7–6(6), 6–4, the Spaniard shot up the rankings.