The PIF ATP Rankings are the merit-based method used by the Association of Tennis Professionals (ATP) for determining the qualification for entry as well as the seeding of players in all singles and doubles tournaments. The first rankings for singles were published on 23 August 1973 while the doubles players were ranked for the first time on 1 March 1976. Ranking points are awarded according to the stage of tournament reached, and the prestige of the tournament, with the four Grand Slam tournaments awarding the most points. The rankings are updated every Monday, and points are dropped 52 weeks after being awarded. Novak Djokovic is the current men's singles world No. 1.

Carlos Alcaraz Garfia is a Spanish professional tennis player. He has been ranked as high as world No. 1 in men's singles by the Association of Tennis Professionals (ATP), and is the current world No. 3. Alcaraz has won thirteen ATP Tour-level singles titles, including two major titles and five Masters 1000 titles. Following his win at the 2022 US Open, Alcaraz became the youngest man and the first teenager in the Open Era to top the singles rankings, at 19 years, 4 months, and 6 days old.