"Usyk is in good conditions now, he successfully recovered from his last fight and looks forward to fight challenge the title this spring."
Usyk has no intention of biding his time with an extra fight before challenging for the WBO belt.
"A non-title fight has never been under discussion and I really hope it will never be," Krassyuk said.
How close is Joshua vs Fury? 0:30 0:24 Anthony Joshua reveals his retirement plan
Joshua said: "I promise you, conversations and face-to-face meetings are happening with representations of my team and Tyson Fury's team."
The location of the dream occasion must also be finalised - boxing will return in the UK in mid-February, the British Boxing Board of Control has announced, after a shutdown throughout January due to a rise in Covid-19 cases.