Ключевые слова: 2019, action, ao, ao 2019, arena, athlete, atp, australia, australian, backhand, ball, center, champion, championship, court, djokovic, final, forehand, game, laver, match, melbourne, national, novak, open, players, points, practice, professional, racket, rod, serbia, serbian, set, singles, slam, sports, stadium, tennis, title, tournament, training, victory, volley,