I love the tennis game,especially the  grand slam also called majors, 
I like tennis too. What exactly is a grand slam in tennis though?
They are the major tennis game with the highest reward but highly competitive. Australian Open in mid January, the French Open in May and June 
Oh so those are the most important games for players to win. Which tennis players have won the most grand slams?
Big Four (tennis)
In tennis, the quartet of men's singles players comprising Roger Federer, Rafael Nadal, Novak Djokovic, and Andy Murray are often referred to as the Big Four. These players are considered dominant in terms of ranking and tournament victories, including Grand Slam tournaments and ATP Masters 1000 events, as well as the ATP Finals, the ATP Tour 500 series and Olympic Games, having dominated the sport among them from 2004 onwards. Alternately, the concept of "Big Three" is used, omitting
Grand Slam (tennis)
The Grand Slam tournaments, also called majors, are the four most important annual tennis events. They offer the most ranking points, prize money, public and media attention, the greatest strength and size of field, and greater number of "best of" sets for men, which is 5. The Grand Slam itinerary consists of the Australian Open in mid January, the French Open around late May through early June, Wimbledon in June-July, and the US Open in August-September