In tennis, players regularly use an "ace serve" to win points. An ace occurs when the server hits the ball in such a way that the opponent cannot intercept it, resulting in a point without a return. Aces are often a product of a player's skill, speed, and precision on the serve, demonstrating an ability to dominate the match from the outset. A strong service game featuring aces can not only shift momentum in favor of the server but also intimidate the opponent. They are seen as a testament to a player's overall serving ability.