National Football League (India)
The National Football League (commonly known as the NFL) was an association football league competition in India between 1996 and 2007 which was organised into three divisions. The league is now transformed into the I-League and continues with that name. The "Premier Division" of the league was first introduced in 1996, though the country already had a long history in the sport thanks to the likes of the IFA Shield and the Federation Cup. In fact, the Santosh Trophy (started in 1941) was the top football competition in the country before the then National Football League started.
Indian Super League
The Indian Super League consists of ten teams from nine different states in India. Unlike other football leagues, the ISL does not use promotion and relegation but instead uses expansion like Major League Soccer in the United States and the A-League in Australia. The league features two main derbies which include the Southern derby between Chennaiyin and the Kerala Blasters, and the Maharashtra derby between Mumbai City and Pune City. In 2017, the league added two new clubs for the first time when Bengaluru and Jamshedpur were awarded expansion teams.