Upon emergency request, I will make a blog explaining the rules of tennis. You can look these rules up anywhere. But I’ll try to make them as concise as possible. If you are a new player, it would be a good idea to print this out and carry it in your bag. Scoring
In a match, the score goes POINTS, GAMES, SETS, and the MATCH. You need points to win a game, games to win a set, sets to win a match.
In a GAME the points go 15, 30, 40, GAME (the only time the count is not normal). You need 4 points to win the game. BUT you have to win by two points. If both players arrive at 40, then it is referred to as DEUCE. From then, both players just fight to get 2 points ahead. Whoever gets one point ahead is said to have the ADVANTAGE or AD. Server’s advantage is AD IN. Returner’s advantage is AD OUT.
In a SET the points are counted normally. The first player to 6 GAMES wins the set. HOWEVER, you still have to win by two games. If both players arrive at 6 games then a tiebreaker is played (explained in the next section). The players alternate service games until the match is over. A tiebreak is considered a service game. Who serves first is usually determined by spinning the racket. Some people flip a coin.
The MATCH is first to 2 sets. This is true for everything except the four biggest tournaments in male professional tennis which is first to 3 sets.
So when someone asks you for the score of the match, you usually have to tell the game score and the set score. If the match is unfinished, then you would tell them the points of the game. I.E. John is up a set and it is 4-3 in the second.
How to Play
Every GAME, the server alternates between the DEUCE SIDE:

And the AD SIDE:

And as such, the deuce side will always have an even score and the ad side will always have an odd score.
The server will get two chances to serve from behind the line, into the diagonal service box to start the point. If the serve misses twice, they lose the point. If they make the serve successfully, then the point continues until someone loses. The three ways a point can end are:
1. Someone hits the ball out of bounds and loses the point
2. Someone lets the ball bounce twice on their side of the court and loses the point (net included)
3. The ball hits a part of the player other than the racket. The struck player loses the point
Scoring the Tiebreaker
The TIEBREAK is first to 7 points, win by 2. Whoever RECEIVED in the last game serves first in the tiebreak. It starts on the deuce side. To start, the server serves the first point and then the opponent serves 2 points. After that, it is a 2 point rotation. You change sides on multiples of 6 points. So if the score is 3-3 or 5-1 or 24-24, you will change sides.
Like regular games, the deuce side will always be even score and the ad side will always be odd. Since the serve always changes on the ad side, someone will serve once (say at 2-3), lose or win the point (2-4), change sides, then serve their second time. It is common to forget to change sides. If you do, keep the points, correct the error.
A couple of extra rules:
1. If a serve hits the net and bounces in the intended service box, it is called a let and you replay the point.
2. If a ball comes from another court, the person whose side of the court the ball bounces has to call the let
3. If the ball hits someone’s racket twice by mistake it is still a playable ball
4. If you toss the ball and don’t swing on your serve, or swing and don’t touch the ball, it is not a fault
5. In singles, the boundary sidelines are the second lines. Doubles boundary sidelines are on the outside. The service box is the same in both.
6. The person on the side the court bounces on calls whether the ball is in or out
7. You can serve anywhere behind the baseline and from the center mark to the sideline mark.
8. You can toss the ball for the serve anywhere as long as you don’t step onto the court before you hit it. This includes the line and the center mark.
Once you get the hang of the rules, it will be second nature!
