According to a News of The World report, Murray is in the form of his life following a new training menu in which he has to munch his way through 6,000 calories a day.
The diet, devised by Murray's fitness trainer Jez Green, also includes bagels, steak, eggs, protein shakes, yoghurt, fruit and cup cakes, and this has helped him add another six pounds of muscle to his already impressive torso.
"Sushi is now my favourite food. The greatest number of sushi pieces I ate in one sitting was 24. Most of the time I eat around 20 pieces every day but I've had more in the past and I'm not bored of it yet. But the hardest part is the breakfast, protein shake and bagels with peanut butter, and the peanut butter sticking to your teeth," Murray was quoted, as saying.
"Then I'll have steak, eggs, yoghurt and fruit. That's really tough each day to keep doing that. I also have cup cakes, for their calorific value, of course," he added.
Murray has bulked up to a muscular 12 stone 7 pounds in the last 12 months and has now emerged as the favourite to win the Australian Open, which starts in Melbourne tomorrow.