2013 ITF Men's Circuit (January–March)

The 2013 ITF Men's Circuit (January–March) encompasses a series of professional men's tennis tournaments organized by the International Tennis Federation (ITF) during the first quarter of 2013. These tournaments form the lowest tier of professional tennis, sitting below the ATP Challenger Tour and the ATP World Tour. Players participating in these events typically consist of emerging professionals and those aiming to improve their world ranking to gain entry into higher-level tournaments. The circuit provides an opportunity for players to earn ATP ranking points and prize money. The January–March period represents the initial phase of the season, with tournaments held across various locations globally. The results of these tournaments contribute to a player's overall ranking and eligibility for future events throughout the year.