Anthony Joshua is the holder of the IBF, WBA and WBO belts after defeating the Bulgarian Kubrat Pulev in December.
Tyson Fury in turn has the WBC belt.
Promoter Eddie Hearn says that next month they hope to be able to finish with a place for the event.
CLIP: Here Mike Tyson goes up in the ring again (29 Nov 2020)
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Mike Tyson was the more aggressive boxer in tonight's show match.
Photo: Bildbyrån