In tennis, a serve that hits the net cord but lands in the correct service box is called a "let" serve. This means that the serve is not counted as a fault, and the server is allowed to take the serve again without any penalty. The term "let" is derived from the idea that the serve is "let through" to the receiver's side, even though it made contact with the net. It's important to note that if the ball hits the net cord and lands outside the service box, it is still considered a fault. read more >>

Let �C a serve is called a let when the ball hits the net cord but still lands in the service court. Such a serve is not considered a fault and the server may repeat the service attempt. A ball that hits the net cord but lands outside the service box is still a fault.read more >>