If you win a grand slam you earn 2000 points in the South African Airways ATP rankings.
Tennis players earn 360 points for making it to the quarter finals in any Grand Slam.
Under the new points system, a Grand Slam victory is worth 2000 points.
Regular match (2 sets): 48 points. Grand Slam (3 sets): 72 points.
10 points as a maximum
we need 4 points to win a game in lawn tennis
1,950 ranking points - 50 points less than for a grand slam - are an offer at the World Tour Finals, 1,500 of which are awarded to the winner.
previously it is for 21point but now it is for 11 points
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.