Ключевые слова: 4044 years, 40s, ball, black, caucasian, caucasian ethnicity, cellphone, colored background, communication, competition, connection, cut out, digital tablet, equipment, fluorescent, fluorescent yellow, game, global communications, handle, male, man, maroon background, mature adult, mature men, metal, metallic, mobile phone, pattern, polyester, racket, racket sport, rubber, screen, shadow, shape, smartphone, sphere, sport, sports ball, sports equipment, sports gear, still life, sweatband, technology, tennis, tennis ball, tennis racket, touchscreen, wireless technology, wristband,