Anthony Joshua's heavyweight encounter with Kubrat Pulev isn't expected to take place any earlier than October.
Originally scheduled for June 20 at the Tottenham Hotspur Stadium, the fight has been postponed because of the coronavirus pandemic.
Meanwhile, promoter Eddie Hearn says a Joshua-Tyson Fury unification bout in 2020 will be nigh-on impossible to arrange.
Fate has conspired against Joshua and Pulev since their proposed 2017 fight at the Principality Stadium in Cardiff was called off because the Bulgarian suffered a shoulder injury.
Hearn had hoped to rearrange the fight for July and August, but that's proving to be a non-starter.
The Matchroom supremo told The Daily Mail, "With everything going on and the fact we have no idea yet about when we will be allowed crowds, and what size crowds, it won't be the summer.
"I think it will be in the window between October and December.
"Sooner would be better than later because we don't want it to be a year between fights."
Joshua's last outing was his unanimous decision victory over Andy Ruiz in Saudi Arabia in December of 2019.
It would seem Tottenham hosting the Joshua-Pulev fight is off the table, with Pulev's manager Ivaylo Gotsev saying this week, "Eddie has spoken to you about the Middle East, which is a great possibility.
"It makes sense, because those countries were not as hard affected and if you take the right precautions, we could really have a safe environment.
"That's something I want to emphasise, and I can't say it enough times - safety first. We don't want to take a risk against anyone's health, no way no how."
China and Croatia are also believed to be in the running to stage the fight.
And while the delay to getting that fight done has pushed a Joshua-Fury showdown further into the distance, Hearn remains hopeful of cashing in on the all-England novelty.
Deontay Wilder is due to be Fury's next opponent as he exercised his rematch clause following their February clash in Las Vegas.
It had been reported that Wilder had accepted a lump sum to step aside, but that's proved unfounded.
Hearn told the Mail, "Step-asides are messy and you don't say never, but it is very unlikely.
"The plan would be for two fights with Fury in 2021 but we have to see."
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