In intermediate tennis, you judge yourself. In professional tennis, there is a line judge. The line judge call outs, lets, and keeps score.
be able to keep your hands behind your back.
skating, gymnastics, swimming, diving, boxing, skiing, tennis
On the tennis court, guys try to court girls.The judge of the Court of Common Pleas liked to play on the tennis court.
You can be an official, line judge, ball boy, towell boy, raquet carrier or an athlete
It's judged by the fact the ball is either in or outside of the lines (court). if it's on the line it counts as in.
In professional tennis -- such as the grand slam opens -- there are line judges who call the balls out, and the players also can challenge calls, in which case they use the computer replay to determine where the ball hit. In lower levels of tennis, such as high school tennis, the calls are made by the players, and in case of disagreement there is usually a redo of the point.