Usyk defeated Joshua by unanimously claiming the WBA, WBO and IBF title in their first contest at the Tottenham Hotspur Stadium two months ago.
The defeat to Usyk ended Joshua’s hope of facing Tyson Fury for a shot at becoming the heavyweight champion.
Eddie Hearn said, “I think it will be the end of March, early April. Both guys are probably resting, although AJ will be doing a bit more preparation because he wants to get it right.”
Anthony Joshua Prepares for Rematch Showdown
He also stated that Joshua was in America to “look, learn and see” as he will be returning to the US at the end of the year.
He said there would be a discussion with Team Usyk in the coming weeks to decide a venue for the showdown.
The Ukrainian has previously said that he would love the rematch in his hometown at the Olympiyskiy Stadium in Kyiv.
Hearn said it is highly “unlikely” as he wants the rematch back in the Uk.