Tennis — sport in which compete  two players («single game»), or two commands consisting of two players («pair game»). A problem of contenders (tennis players or tennis-players) is by means of rackets to send a ball on the party of the contender so that that could not reflect it, thus, that the ball has not taken off for a game field.

Modern tennis has an official name "laun-tennis" (English lawn — a lawn) for difference from real-tennis (or, in the French variant of the name) — older version in which play the closed premises and on perfect other type of court. Tennis is an Olympic kind of sports.