How many Grand Slam tournaments are held in tennis each year? Four. They are the Australian Open, French Open, Wimbledon, and US Open—the sport’s four major annual championships.
Each tournament is played over roughly two weeks and features the world’s leading singles, doubles, and mixed-doubles players. The events also differ by surface: the Australian Open and US Open use hard courts, the French Open is played on clay, and Wimbledon is played on grass.
Their seasons span most of the calendar year. The Australian Open is played in January, Roland-Garros generally runs from late May into June, Wimbledon follows in late June or early July, and the US Open takes place in late August and September. This sequence is often called the Grand Slam calendar.
A common mix-up is confusing the four tournaments with winning a “Grand Slam.” The tournaments are the events themselves; a player achieves a calendar-year Grand Slam by winning all four in the same year. The term is also sometimes used informally for any one of the four majors.