Briton Dereck Chisora’s heavyweight bout against unbeaten Ukrainian Oleksandr Usyk, originally scheduled for May, will take place on 31 October.
The venue of the fight is yet to be confirmed and there will be no fans because of new government restrictions.
Chisora, 36, has not fought since a fourth-round stoppage victory over compatriot David Price in October 2019.
Usyk, 33, is a former undisputed cruiserweight champion who stepped up to heavyweight last year.
Chisora has a record of 32 wins and nine defeats in 41 professional bouts and is managed by former rival and two-weight world champion David Haye
Usyk, a 2012 Olympic gold medallist, comfortably won on his heavyweight debut in October 2019 by stopping Chazz Witherspoon in the seventh round, extending his career record to 17 wins and no defeats.