V.League 1 is the top professional football league in Vietnam. Established in 1980, it features 14 teams competing annually for the championship title. The league operates on a promotion and relegation system with V.League 2, the second tier of Vietnamese football. Matches are typically held from January to October, with each team playing 26 games in a round-robin format. The team with the most points at the end of the season is crowned the champion. V.League 1 has gained popularity in recent years, contributing to the growth of football in the country.