Ace – a serve that lands in the service box and is then untouched by the opponent.
Break – server losing his or her game.
Break point – one point away from a break.
Challenge – when either player disputes whether the ball landed in or out.
Double fault – hitting a fault on the second service. The server loses the point.
Fault – an unsuccessful serve that does not start the point because the ball does not land in the opponent's designated service box.
Foot fault – a fault caused by the server stepping across his base line or the center line before striking the ball with his racquet.
Hold – Server winning the game.
Let – 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.
On serve – both players have held each of their service games in the set or had an equal number of service breaks in the set, putting them "back on serve".
Service winner – a serve that is touched by the opponent, but not returned
