When you play tennis the score is love (0), 15, 30, 40, won. If both players are at 40 it is called deuce. Once you are at that stage the next person that gets a point gets advantage you only need one point the win once you are at advantige and if the other team gets the point you are back at deuce. There is no contact and was first played in the 19th century. you get a point by the other team hitting the ball out, not hitting it over the net, or the other team doesn't serve it right the first 2 tries.