The Czech First League, known as the Chance liga for sponsorship reasons, is a Czech professional league for football clubs. At the top of the Czech football league system, it is the country's primary football competition. Seasons typically run from August to May, most games are played on Saturdays and Sundays with few games played on Fridays. All Chance liga clubs qualify for the Czech Cup.
The history of the Czech football league began with its reorganization for the 1993–94 season following the dissolution of Czechoslovakia and therefore the league became the successor of the Czechoslovak League. Thirty-five clubs have competed in the Czech First League since its founding. Sparta Prague has won the title 14 times, the most among Czech clubs and are the reigning champions. Other clubs that were crowned as champions are Slavia Prague, Slovan Liberec, Baník Ostrava and Viktoria Plzeň.
Based on performances in European competitions over the past five years, the league is ranked 10th in the UEFA league rankings for the 2024–25 season.