Under the eyes of twenty thousand spectators at Arthur Ashe Stadium in New York and millions of television viewers worldwide, on Friday, September 11, 2015 the second semi-finals of the US Open women’s singles tournament took place. Pitted against each other Serena Williams, 34, American, top ranker predicted to rack up the singles Grand Slam, and Roberta Vinci, 32, Italian, forty-third in world ranking. Bookmakers gave Roberta a 300 to 1 chance of winning...