Carlos Alcaraz Garfia (born 5 May 2003) is a Spanish professional tennis player.

He is currently ranked as the world No. 1 singles player by the Association of Tennis Professionals (ATP).

Alcaraz has won six ATP Tour singles titles, including the 2022 US Open and two Masters 1000 titles.

By winning the US Open in September 2022, Alcaraz became the youngest ever men's world No. 1, at 19 years 4 months and 6 days old; he also became the first teenager to top the men's rankings.

As a junior, Alcaraz was ranked as high as world No. 22 and won two titles on the ITF Junior Circuit.

After turning professional in 2018, he won three titles on the ITF Men's World Tennis Tour and four on the ATP Challenger Tour and broke into the top 100 in rankings in May 2021.

Two months later, Alcaraz reached his first ATP Tour final at the 2021 Croatia Open, an ATP 250 tournament, where he won his first title.

He later entered the top 50 after reaching the quarterfinals at the following US Open and won the year-end 2021 Next Generation ATP Finals in Milan.

For the Argentine professional footballer, see Carlos Alcaraz (footballer). In this Spanish name, the first or paternal surname is Alcaraz and the second or maternal family name is Garfia.