Grand Slam (tennis)
Annual tennis events
The Grand Slam tournaments, also referred to as majors, are the world's four most important annual tennis events. The tournaments offer the most ranking points, prize money, public and media attention, the greatest strength and size of field, and greater number of "best of" sets for men, which is 5. Grand Slam tournaments are not operated by the Association of Tennis Professionals (ATP) or the Women's Tennis Association (WTA), but by the International Tennis Federation (ITF). However, the ATP and WTA do award ranking points based on a player's performance at a major.