List of male singles tennis players
This is a list of top international male singles tennis players, both past and present.
It includes players who have met one or more of the following criteria in singles:
- Officially ranked among the top 25 players by the Association of Tennis Professionals (since 1973)
 - Ranked among the top 10 by an expert (e.g. A. Wallis Myers) before 1973
 - Reached the quarterfinals of a Grand Slam tournament
 - Reached the finals of year-end championships
 - Won a medal at the Olympic Games
 
Players who have won at least one Grand Slam singles title or have been ranked world no. 1 in singles are in bold. Players who are still active on the tour are in italics.