PARIS, Dec 5 — Nick Bollettieri, the larger-than-life coach whose famed Florida tennis academy changed the face of the game by producing some of its greatest players, has died at the age of 91, with ex-student Tommy Haas leading tributes to the “one of a kind” American.

The son of Italian immigrant parents, Bollettieri served in the United States army and dropped out of law school to become a coach, shaping the careers of top names including Andre Agassi, Serena and Venus Williams, Monica Seles and Maria Sharapova.