The Karachi Kings–Lahore Qalandars rivalry is a cricket rivalry between two teams in the Pakistan Super League (PSL), an old city rivalry between the cricket teams of Karachi and Lahore that has continued in the PSL as well. It is considered to be the biggest rivalry in the PSL, fuelled in part by the size of the two cities, the two most populous in the country, that they play for and their historic economic and cultural rivalry. A Karachi–Lahore clash is known typically as a heated contest which "brings out the best in players". The two cities share a rivalry in domestic cricket that dates back to the 1950s and 1960s, with the PSL providing a high-voltage platform that allows it to thrive. It is sometimes also known as the "El Clásico of PSL".