After a year disrupted by injury , it was a moment of candor from the down-to-Earth 23-year-old , whose winning ways on the court had at times made him seem invincible . 23-year - old Spanish tennis player lost his number one ranking this year . Started season with win at French Open , but year disrupted by injury . Has won six Grand Slam title in his career so far .
23-year - old Spanish tennis player lost his number one ranking this year . Started season with win at French Open , but year disrupted by injury . Has won six Grand Slam title in his career so far .