An ace gives the server the point immediately, without a rally. It can result from pace, placement, spin or disguise. A high ace rate usually signals a major serving weapon, particularly on faster surfaces.

Aces provide free points and shorten service games. They contribute to hold rate, reduce exposure in rallies and can be especially valuable on high-pressure points. Ace statistics help identify players capable of imposing their serving rhythm.

A player serves wide, the receiver cannot touch the ball and the point ends immediately. The serve is recorded as an ace.