Novak Djokovic: Grand Slam losses are greatest lessons

Novak Djokovic said the greatest of defeats in his career had taught him more than anything else as he suffered a straight-sets loss to Rafael Nadal in the French Open final on Sunday.

Nadal won an astonishing 13th Roland Garros title to equal Roger Federer's all-time record of 20 Grand Slams, inflicting a fourth French Open...