Ключевые слова: action, activity, adults, bearded, blurred, caucasian, competition, daytime, elderly, exercise, exercising, friends, friendship, game, grey hair, men, net, old, people, relationship, selective focus, sport, sporting, sportive, sportsmen, sportswear, sporty, summer, summertime, team, tennis, tennis court, tennis equipment, tennis racquets, together, togetherness, training,