This article covers the period 1884 to present. Before the beginning of the Open era in April 1968, only amateurs were allowed to compete in established tennis tournaments, including the four Grand Slams. Wimbledon, the oldest of the majors, was founded in 1877, followed by the US Open in 1881, the French Open in 1891, and the Australian Open in 1905. Beginning in 1905 and continuing to the present day, all four majors have been played yearly, with the exception of the two World Wars, 1986 for the Australian Open, and 2020 for Wimbledon. The Australian Open is the first major of the year (January), followed by the French Open (May–June), Wimbledon (June–July), and US Open (August–September).
There was no prize money and players were compensated for travel expenses only. A player who wins all four current major tournaments in the same calendar year, as an individual or as part of a doubles team, is said to have achieved the "Grand Slam". If the player 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". Winning the four majors and a gold medal in tennis at the Summer Olympics has been called a "Golden Slam" since 1988.[1] Winning all four plus gold at some point in a career, even if not consecutively, is referred to as a "Career Golden Slam". Winning the Year-end Championship also having won a Golden Slam is referred to as a "Super Slam".[2][3][4] Winning the four majors in all three disciplines a player is eligible for–singles, doubles, and mixed doubles–is considered winning a "boxed set" of Grand Slam titles.
The current Grand Slams are the four most prestigious tournaments in the world held every year, they are distinguished by participation from almost every top player and by their two-week duration, 128-player draw in women's singles. It's extremely rare for a player to win all four tournaments, "the Grand Slam", in one calendar year. This was only achieved three times since 1888 by Maureen Connolly, Margaret Court, and Steffi Graf, the latter of whom stands alone in winning the "Golden Slam". These are some of the important records since the start of women's tennis in 1884. Most statistics are based on the data at the WTA Tour and International Tennis Federation, the official websites of each respective Grand Slam tournament and published sources though this is not a definitive list due to the time periods involved. Active streaks and active players are in boldface.
* Not all sources agree with one of Wills' losses. She did not play two matches because of appendicitis, causing her to miss the 1926 Wimbledon Championships. Wimbledon did not assign a loss to her or a win to her opponent. The other tournament gave her a loss instead of a default to her and a walkover to her opponent, neither of which count as a loss or a win. It is unknown why the tournament chose to assign a loss to her. Taking these facts into consideration, her adjusted win percentage would be 125–3 = 97.66%.
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Maureen Connolly
Margaret Court
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Steffi Graf
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Martina Hingis
Maria Bueno
Gabriela Sabatini
Alizé Cornet
Ai Sugiyama[9]
Francesca Schiavone
Jelena Janković
Elena Likhovtseva 
Justine Henin
