After all, it was in his own book, Serve to Win, that he detailed the moment his transformative gluten-free diet began in 2010, when he self-diagnosed a celiac allergy by pressing a slice of bread against his abdomen. From the tyranny of multi-grains, his beliefs span into the realms of telepathy and telekinesis, levitation and a “higher source”. Only recently, on an Instagram Live chat with Chervin Jafarieh, founder of Cymbiotika, a wellness brand selling non-FDA approved potions for £30-a-pop, Djokovic claimed the “power of prayer” could purify polluted water and that sour dinner conversation threatens to strip foods of their nutrients.