WBA World Light-Welterweight champion Andreas Kotelnik has revealed his secret weapon in his fight against Amir Khan - spinach.
But the Ukraine's answer to Popeye says it's not any old spinach, but prize-winning bunches of the superfood shipped in from a secret destination in his home country to his German training base.
The 31-year-old tackles Khan in the third defence of his title at London's O2 Arena on June 27.
And he insists that tucking into the iron-rich nutrient three times a day has left him in the best shape of his life.
"I came to England for a press conference last week, and missed out on spinach for lunch, and I could feel my energy levels dropping," said Kotelnik.
"Fortunately I had a double portion when I got back to Hamburg and I felt better than ever.
"I've been munching on spinach since I began boxing when I was six years old.
"My first boxing trainer told me that it would turn me into the heavyweight champion of the world.
'Unfortunately it didn't make me grow that big, but it will make me far too strong for Amir Khan's powder-puff punches.
"People call me Popeye back home - but if they met Amir, they'd compare him to Olive Oyl!
"I have spinach with my porridge in the morning, a big bowl with my lunch and then spinach with my steak in the evening.
"And it all comes from a family-run farm in my home city of Lviv which has been cleaning up at regional agriculture shows for years.
"They use a special fertiliser that helps make the spinach extra big, and I believe it also supplies heavyweight world champions Vitali Klitshchko and Wladimir Klitschko."
