A true Grand Slam in tennis is when a player wins all four Grand Slam tournaments in the same year. Otherwise it is just a career Grand Slam, and not a true Grand Slam.
Tennis Grand Slam tournaments: Australian Open, French Open, Wimbledon and the US Open
The four most important tennis tournaments of the world are called Grand Slam tournaments. They are: the Australian Open, the French Open, Wimbledon and the US Open. Any player who wins these four tournaments in a row is said to have won the Grand Slam.
The tennis Grand Slam is a annual tournament. There three tournaments within the Grand Slam. The US Open, the Wimbledon, and the Australian Open.
It is not as much about how many tournaments you have played, as how you have done in those tournaments and the number of points you have earned.
2 - us open 2001 and Wimbledon 2002
for every grand slam match, it is best 3 out of 5 for men, and best 2 out of 3 for women
The four major tennis tournaments; the US Open, the Open Championships(wimbledon), Roland Garros (French Open), and the Australian Open are known as the Grand Slam of tennis. Hitting a grand slam in baseball scores four runs and is the greatest accomplishment a baseball player can achieve during one at bat. Likewise, winning the Grand Slam of tennis involves winning four tournaments and is considered the greatest accomplishment in tennis. Because "tournament which makes up part of the Grand Slam of tennis" is so long it is usually shortened to "Slam".
The four grand slam tournaments are as follows: the Australian Open, the French Open, Wimbledon, and the U.S. Open.