A tennis court is a rectangle, split in half by a net. The goal is to hit the ball over the net and into your opponent's side of the court. The lines on the court define the boundaries of play.

The outermost lines are the baselines and the doubles sidelines. If you're playing singles (one-on-one), the ball must stay within the inner sidelines. For doubles (two-on-two), the wider court is used.

The boxes closest to the net are the service boxes. These are important for the serve, which starts every point.

You don't need much to play tennis, but the right equipment helps. Your most important tool is the racket. Rackets come in different weights, sizes, and string tensions. A lighter racket is easier to swing, which is great for beginners. As you get stronger, you might prefer a heavier one for more power.

Tennis balls are pressurized and covered in felt. You've probably seen the standard bright yellow ones, but beginners often use lower-compression balls (orange or green) that bounce lower and slower, making them easier to hit.

Finally, wear comfortable clothes you can move in and, most importantly, tennis shoes. They're designed for the quick side-to-side movements of the game and provide the right support to help prevent injuries.

The basic idea of tennis is simple: hit the ball over the net into your opponent's side of the court. You win a point if your opponent fails to return the ball into your court.

Every point begins with a serve. One player stands behind their baseline and hits the ball into the service box diagonally opposite them. For example, if you serve from the right side of your court, the ball must land in your opponent's right service box (the one on your left).

You get two chances to hit a legal serve. If you miss both, you lose the point. If your serve hits the net but still lands in the correct service box, it's called a "let," and you get to redo that serve without penalty.

Once a serve is legally in, the players rally. They hit the ball back and forth over the net. During a rally, the ball must land anywhere within the court boundaries (singles or doubles lines, depending on the game). It can only bounce once on your side before you must hit it back. If the ball bounces twice, or if you hit it into the net or outside the lines, you lose the point.

With these fundamentals, you understand the basic framework of a tennis match. The court, the gear, and the rules of the rally are the building blocks for everything else.