Wladimir Klitschko

Klitschko, who is entering his 29th world title fight, revealed on Thursday he has made a video of his prediction for their heavyweight bout at Wembley.

That has been saved on a memory stick which will be sewn into his robe.

"It's strategy," said Joshua, 27. "An attempt at a mind game. I didn't take it the way he wanted to express it."

Former heavyweight champion Klitschko, 41, will auction his robe - and its contents - for charity after the Wembley Stadium super fight for Joshua's IBF title and the vacant WBA belt.

Crowds are usually capped at 80,000 for transport network capacity reasons but an attendance of 90,000 is expected for the contest in which Joshua's IBF title and the vacant WBA Super and IBO heavyweight belts are up for grabs.

It would match the record 90,000 attendance for the Len Harvey versus Jock McAvoy bout at London's White City in 1939.

"(London Mayor) Sadiq (Khan) urged me to bring the biggest fights to the city and I'm delighted to have the biggest fight in British boxing history at Wembley," Eddie Hearn told the BBC.

Klitschko has a minor injury which he suffered in training and the fight has now been postponed until next year.

Joshua's promoter Eddie Hearn announced this morning that with the Ukranian sidelined and with no decision made over whether the WBA title would be on the line, the fight could not happen on the date suggested.

"We've been in deep negotiations for a few weeks now waiting on the decision from the WBA," Hearn said.

Fury was scheduled to defend the WBA and WBO titles he took off Klitschko last November on July 9, but the Briton cancelled the bout due to a sprained ankle.

It was confirmed on Wednesday that Klitschko will get the opportunity to gain revenge for that surprise loss in Dusseldorf when he goes toe-to-toe with Fury in the Englishman's home city next month.

"I'm delighted that we can finally get the fight back on and in Manchester on October 29th," the defending champion's coach and uncle Peter Fury said.