I love watching professional tennis on TV.
I agree as the players can get agressive at times, sending the ball in bounds without a valid return by the opponent
Yes it's very exciting and entertaining.
The players have to strategically hit the ball as to not allow an inbound return. 
I've tried to play before, it's not easy!
The tennis point system is interesting. The player unable to return the ball scores zero, the other player gets a point.
Yes and then doesn't it go to 15 then 30?
Yes ! The point system and rules of present day tennis has not changed much since the 1890s.
I guess if it works no point in changing it.
gain a point, while the opposite player will.
Tennis is an Olympic sport and is played at all levels of society and at all ages. The sport can be played by anyone who can hold a racket, including wheelchair users. The modern game of tennis originated in Birmingham, England, in the late 19th century as lawn tennis. It had close connections both to various field (lawn) games such as croquet and bowls as well as to the older racket sport today called real tennis. During most of the
sound of the ball leaving the grunter's racquet and prevented an experienced opponent from using that clue as to force and spin to address his or her reception of the ball and the return stroke. Another former player, Chris Evert, stopped short of labelling it as cheating but said: "I wouldn't go that far [to say it's cheating] but I think the grunts are getting louder and more shrill now with the current players".
Some tennis players have defended grunting. Michelle Larcher de Brito, who