> In tennis, someone who has won the Australian Open, French Open, U.S. Open, andWimbledon in the same calendar year has made which achievement?And the answer: Grand Slam. Photo courtesy: Walter / Getty Images.Since 1938, there have only been sixindividual Grand Slam Champions. However, 18 men and women have won what's knownas a "Career Grand Slam," winning the four tournaments not all in one year, butover their entire careers.To win a Grand Slam title, the requirements are intense. A common misuse of thetitle designates a player who has won any of the four major tournaments in agiven year, however, a true Grand Slam winner must compete in all fourtournaments that span an exhausting eight-month period (and then win eachtournament on top of that!). One of the most daunting tasks for even the besttennis players is maintaining enough stamina, energy, and drive to compete atsuch a high level for nearly an entire year. The four Grand Slam tournaments are also called The Majors. These games areacclaimed internationally for their world ranking points, tradition, andprize-money, as well as their high levels of public and media attention. Out ofthe four, Wimbledon was the first to be founded, and in fact clocks in as theoldest tennis tournament in the world. The first game was played in 1877, and isconsidered to be the most prestigious of the bunch today. Interestingly, the year 1968 marks the beginning of the "open era" inprofessional tennis. The open era, which persists into the current day, marks aturning point in tennis history – it began when Grand Slam tournaments agreed toallow professional players to compete with amateurs, ending the division thathad persisted since the dawn of the sport in the 19th century. The French Openwas the first “Grand Slam” event to go open.Learn more about the history of tennis and its tournaments here[https://www.olympic.org/news/a-brief-history-of-tennis].