Tony Bellew's rematch with Isaac Chilemba has been added to the undercard of Carl Froch's mammoth fight with Mikkel Kessler on 25 May.
The pair fought to a draw in Liverpool in March in the World Boxing Council light heavyweight title eliminator, with the winner due to face champion Chad Dawson or Adonis Stevenson later this year.
And the victor of the bout remains on course for that title showdown later in 2013 with Bellew and Chilemba due to join the undercard at the O2 Arena which already includes George Groves facing an unnamed opponent.
"The winner of the fight was to become the mandatory challenger for Dawson's WBC belt but it was a draw so there was no mandatory challenger," Eddie Hearn told Sky Sports News. "We need to find one.
"Both men were reasonably poor on the night so both need to get it off their backs. They're doing it in double-quick time."
Dawson, beaten by Andre Ward in his last fight, could face Stevenson in June and Hearn, Matchroom Boxing managing director, is confident he can make the fight happen in the autumn.
"Dawson could potentially fight on the same night, they're rumouring that against Adonis Stevenson. Dawson's either fighting the same night or the week after," he added.
"Bellew or Chilemba will fight the winner of that fight probably in September but both men have to put in a much better performance this time. That's why they're fighting again so quickly, its nine weeks from fight to fight, Tony is desperate to put on a much better show."
Bellew was visibly furious after his bout with Chilemba was scored 116-115, 112-162 and 114-114.
"What was the judge watching who scored it by four rounds to Chilemba?" Bellew said after the fight. "Even his own trainer, Buddy McGirt, one of the most respected trainers in the world, thought I had won the fight.
"He's canny and he's clever but I just believe I'm a better fighter. I want an immediate rematch, I'm willing to get right back in with him. I'd do it right now."