Rafael Nadal retains passion for tennis after claiming 16th grand slam title

Rafael Nadal put the seal on a throwback year for men's tennis by winning his 16th grand slam title at the US Open.

With the Spaniard also claiming his 10th French Open title and Roger Federer winning in Australia and Wimbledon, it is the first time for seven years that the sport's two biggest superstars have swept its greatest prizes.