Ключевые слова: activity, athlete, athletic, background, ball, blue, close, compete, competition, concept, court, equipment, exercise, field, fitness, floor, flying tennis ball, game, green, health, healthy, indoor, leisure, lifestyle, line, match, net, object, outdoors, play, professional, racket, racquet, recreation, set, single, sphere, sport, string, tennis, tennis ball, tournament, training, up, white, yellow,