World No.1 Novak Djokovic has mentioned his extreme sacrifices for attaining success in the sport of tennis in a book, and said he did not even allow himself a whole chocolate bar after an epic six-hour battle to beat Rafael Nadal at the 2012 Australian Open.
According to news.com.au, Djokovic is so dedicated to his diet that when he craved chocolate after his win, he took only one square and left the rest.
The world's number one tennis player this month released a book in which he details the extreme sacrifices he makes in pursuit of physical excellence, the report said.
Serve To Win, the 14-day Gluten-Free Plan for Physical and Mental Excellence explains how Djokovic attributes his career success to the gluten-free diet he turned to three years ago, the report added.