| Racket | The instrument that's used to hit the ball. It has a long, straight handle and an oval frame strung with natural gut or a synthetic material. Up until the late 1960s, rackets were made of wood, but then steel and aluminum frames were introduced, followed by frames of graphite, fiberglass, titanium, and carbon. Maximum dimensions are 29½ inches in overall length, 12½ inches in overall width. The hitting surface can be no more than 15½ inches long and 11½ inches wide. Also spelled racquet. |
| Rally | An extended exchange of shots between players or sides. |
| Ready position | The position adopted by the receiver in anticipation of the serve. |
| Receiver | The player who receives service throughout a game. |
| Referee | The official who is in overall charge of a tournament. The referee doesn't officiate at matches, but may be called upon by the umpire to interpret a rule. |
| Retrieve | To reach and return a shot that's difficult to get to. |
| Retriever | A player who tries to wear down the opponent by concentrating on defense, continually chasing down and returning difficult shots. |
| Return | To hit an opponent's shot back over the net and in play. After service, every successful shot is a return. |
| Reverse spin | See backspin. |
| Reverse twist | A serve that has spin causing it to bounce high and to receiver's right, off a right-handed player's racket. Opposite of American twist. |
| Round | A series of matches in an elimination tournament, the winners of which advance to the next round. |
| Round robin | A tournament in which each player meets every other player and final standings are determined by the won-lost records. Such a tournament is sometimes a preliminary round to determine seedings and order of play. |
| Run around the backhand | To make excessive movement in order to play a ball on the forehand rather than on the backhand. |
| Runback | The area between the baseline and the backstop. |
| Run down | Same as retrieve. |