Ключевые слова: 2019, action, ao, ao 2019, arena, athlete, atp, australia, australian, backhand, ball, center, champion, championship, coach, court, exercise, game, laver, match, melbourne, mouratoglou, national, net, new, open, overhead, patrick, players, points, practice, professional, racket, rod, semifinal, serena williams, serve, set, singles, slam, spanish, sports, stadium, tennis, title, tournament, training, volley,