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