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