The I-League, officially known as the Hero I League due to sponsorship reasons, is an Indian professional league for men's association football clubs. Contested by 9 clubs (currently), it operates on a system of promotion and relegation with the I-League 2nd Division as well as a system of direct-entry.
Seasons run from January to May, with teams playing 18 matches each, totalling 90 matches in the season. Most games are usually played in the afternoons during the weekends or midweeks. It is currently sponsored by Hero.