Ключевые слова: 2018, angelique, athlete, backhand, ball, billie, center, championship, competition, court, example, flushing, forehand, game, german, germany, grand, jean, kerber, king, match, national, net, new, ny, nyc, open, player, points, practice, professional, racket, set, singles, slam, sport, sports, stadium, tennis, tournament, training, us, us open, volley, york,