Ключевые слова: activity, athlete, background, ball, blue, competitive, concentration, confidence, court, equipment, exercise, exercising, fitness, game, hit, holding, individual, leisure, lifestyle, male, man, match, net, observation, observed, outdoor, person, play, player, practice, professional, racket, recreation, set, shade, sport, sportsman, sportswear, standing, strong, summer, swinging, tennis, tennis player, through, training, view, web, wellness, young,