Football in India
National Football League, established in 1996 by governing body All India Football Federation (AIFF) was the first "semi-professional" football league in India. 
The League was renamed and restructured and the I-League was founded in 2006 after India's former top league the National Football League disbanded in a successful effort aimed at increasing the game in India. Links with clubs that were not in the I-League were maintained, and each season the bottom two clubs are relegated from the I-League and replaced by two from the I-League 2nd Division. The I-League is currently contested between 11 clubs. The Kolkata Derby in the I League (and other tournaments) played between Mohun Bagan and East Bengal is one of the most fierce rivalries in the world (featured in FIFA website) and one of the oldest derbies in the world (90 years). An average 80, 000 to 100, 000 supporters throng the stadium in this special fixture.
Football in India
Right now the official youth leagues in India are I-League U18, U15 Youth league and U13 Youth league. I league U18 started as U19 tournament in 2011. 2017–18 season U18 champions are Shillong Lajong. AIFF started U16 Youth League in 2015 (later renamed U15 Youth league) in the wake of 2017 FIFA U-17 World Cup (hosted by India). Minerva Academy is the reigning three-time champions of U16 League.