The Kolkata Derby, (locally known as "Boro Match" or 'Big Match' in Bengali), is the football match in Kolkata, between arch rivals East Bengal and ATK Mohun Bagan (Mohun Bagan till 2019–20). In January 2020, Kolkata based Indian Super League club ATK and the football department of Mohun Bagan merged to form ATK Mohun Bagan. The rivalry between these two teams is exactly 99 years old, and the matches witnessed large audience attendance and rivalry between patrons. It is considered as one of the biggest Asian footballing rivalries. The first match was played on 8 August 1921 in and latest match of this historical derby was played on 29 October 2022 in Indian Super League. The Kolkata Derby is considered to be greatest derby in Asian Football and also one of the biggest derbies in the world