Carlos Alcaraz Garfia (কার্লোস আলকারাস) is a Spanish professional tennis player. He has been ranked as the world No. 1 in men's singles by the Association of Tennis Professionals (ATP), including as the year-end No. 1 in 2022. Alcaraz has won 21 ATP Tour-level singles titles, including five major titles and seven ATP 1000 titles.

Alcaraz began his professional career in 2018 at age 15. He broke into the top 100 in rankings in May 2021, and ended that year in the top 35 after reaching the US Open quarterfinals. In March 2022, he won his first ATP 1000 title at the Miami Open at the age of 18. Alcaraz won his first major title at the 2022 US Open, becoming the youngest man and the first male teenager in the Open Era to top the singles rankings, at 19 years, 4 months, and 6 days old Finishing the year as the youngest year-end No. 1 in ATP ranking history, he was named the Laureus World Breakthrough of the Year for his performance in the season.

Carlos Alcaraz Garfia was born on 5 May 2003, in El Palmar, Murcia, Spain, to parents Carlos Alcaraz González and Virginia Garfia Escandón. Alcaraz has one older brother, Álvaro, and two younger brothers, Sergio and Jaime.

Alcaraz started playing tennis at the age of four at the Real Sociedad Club de Campo de Murcia, where his father was a tennis coach and club administrator. His mother worked as a sales assistant at IKEA. Alcaraz's father had played tennis but stopped as a teenager as he could not afford to continue.

Alcaraz was discovered as an eleven-year old by Albert Molina, who convinced IMG to sign him and eventually introduced him to future coach Juan Carlos Ferrero.

Alcaraz is an all-court tennis player, but primarily employs an aggressive baseline style of play. His forehand is typically his most potent shot: he can either hit it flat and fast for winners from every court position, or add a great amount of topspin and margin over the net. He plays with a flatter and lower net-clearance two-handed backhand. Due to his aggression, Alcaraz typically generates a high number of both winners and unforced errors off his groundstrokes, particularly his forehand.

Alcaraz has a powerful first serve for his height; commonly around 115 to 120 mph, but hit with average placement. Alcaraz often adds topspin to his second serve in order to generate a high bounce which either pushes back or forces a weak return from his opponents. This serve typically reaches 150 to 170 km/h (93 to 106 mph). Due mostly to its lack of targeted placement, Alcaraz's serve is often described as a relative weak spot in his game. He is elite as a returner, particularly of first serves. In 2024, he won nearly a third of his opponents' service games.

Alcaraz's childhood coach was Kiko Navarro. In September 2018, Alcaraz moved to Villena to begin training at the Ferrero Tennis Academy. Ferrero turned down several coaching requests from top players in order to coach a teenage Alcaraz. Their partnership has been widely praised: Ferrero won the ATP Coach of the Year Award in 2022. In 2023, Alcaraz said he considered Ferrero a "second father".

In December 2024 it was announced that Samuel López, a former member of Ferrero's own coaching team, would be joining Alcaraz's team to work under Ferrero as a second coach.