| − | Tennis is a [[sport]] that is played by hitting a bright green [[ball]] back and forth over a net with large rackets. It is played on a variety of surfaces, most commonly concrete, clay, and grass. | + | Tennis is a [[sport]] that is played by hitting a bright blue [[ball]] back and forth over a net with large rackets. It is played on a variety of surfaces, most commonly concrete, clay, and grass. |