The Grand Slam in tennis reference article from the English Wikipedia on 24-Apr-2004
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Grand Slam in tennis

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A Grand Slam is a term in tennis used to denote holding all four of the following championship titles at the same time:

Grand Slams
Australian Open
French Open
Wimbledon
US Open

The term was originally restricted to the winning of all four tournaments in the same calendar year.

These tournaments are therefore also known as the Grand Slam tournaments, and rank as the most important tennis tournaments of the year in the public mind as well as in terms of the ranking points and prizemoney awarded for performances in them.

In 1938, Don Budge

In 1962, Rod Laver

In 1969, Rod Laver

In 1953, Maureen Connolly

In 1970, Margaret Smith Court

In 1988, Steffi Graf