Ключевые слова: 2013, action, athlete, backhand, ball, best, billie, center, champion, championship, court, example, flavia, flushing, forehand, game, grand, italian, italy, jean, king, match, national, net, new york, ny, nyc, open, pennetta, players, points, practice, prize, professional, racket, serve, set, singles, slam, speed, sports, stadium, strings, tennis, title, tournament, training, us, volley, wta,