Ключевые слова: 2018, action, athlete, athletic, atp, backhand, ball, billie, center, championship, competition, court, djokovic, example, flushing, forehand, game, grand, jean, king, match, national, net, new, novak, novak djokovic, ny, nyc, open, play, player, points, practice, professional, racket, serbia, serbian, set, singles, slam, sport, sports, stadium, tennis, tournament, training, us, us open, volley, york,