PSG haven't lost in the league in September in seven years, with their last defeat coming against Monaco in 2009. Leonardo brought Marco Verratti to Paris Saint-Germain as a relatively unknown talent and now believes the Italy international has developed into one of the world's best midfielders. Verratti, 23, joined PSG in the summer of 2012, with his arrival in the French capital from Pescara overshadowed by the unveiling of Zlatan Ibrahimovic on the same day. Since then, however, Verratti has made a real name for himself at the Parc des Princes, playing a central role in the club's four successive Ligue 1...