The four Grand Slam tournaments, also called the Majors, are the most important tennis events of the year in terms of world ranking points, tradition, prize-money awarded, and public attention. They are:

Australian Open
French Open
Wimbledon
US Open

A singles player or singles and doubles team that wins all four Slam tournaments in the same year is said to have achieved the Grand Slam. If the player or team wins all four consecutively, but not in the same calendar year, it is called a Non-Calendar Year Grand Slam. Winning all four at some point in a career, even if not consecutively, is referred to as a Career Grand Slam, while winning the four majors and a gold medal in tennis at the Summer Olympics has been called a Golden Slam since 1988, when Steffi Graf accomplished that feat in a single calendar year.