There are four tournaments in the "Grand Slam" of tennis: The Australian, French, and U S Opens and England's Wimbledon championship The phrase came from contract bridge by way of golf
the four major championships in golf are considered the "Grand Slam" events (Masters, U S Open, British Open, PGA) 2 to win all four major championships in one calendar year is called the ("Holy Grail") Grand Slam Example: In the 2000 season Tiger Woods won 3 of the 4 Grand Slam events
One of the four major pro tournaments (Australian Open, US Open, Wimbledon, French Open)
the four major championships in golf are considered the "Grand Slam" events (Masters, U S Open, British Open, PGA Championship) 2 (aka: "holy grail") to win all four major championships in one calendar year is called the Grand Slam/holy grail Example: "In the 2000 season Tiger Woods won 3 of the 4 Grand Slam events falling one short of the holy grail "
winning of the main sporting events in a season; home run with bases loaded (Baseball); winning of all the tricks in a hand (Bridge)
To win all 4 of major tennis tournaments (Australian Open, French Open, Wimbledon, and US Open) in one season you are said to have won the Grand Slam Therefore, the 4 major tournaments are also known as Grand Slam events
Refers to the four premier professional tennis tournaments: the Australian Open, French Open, Wimbledon and U S Open Each event is also individually referred to as a Grand Slam tournament