The 26-year Chisora has switched allegiance to Britain. Despite the souring relations between Harare and 10 Downing Street, Chisora has stood up to be noticed by the world.
Danny Williams was initially scheduled to fight Chisora but pulled out blaming a viral infection.
The fight at Wembley Arena had already been hit by the withdrawal of Williams’ original opponent Sam Sexton.
He was replaced by the unbeaten Chisora after cutting his hand in training.
Promoter Frank Warren says he is now in talks with two boxers who hold wins over Williams and may be able to step in at short notice.
Chisora had been due to meet Williams last year but was suspended after biting opponent Paul Butlin on May 22.
He was banned for four months and fined £2,500 for the incident which took place at York Hall in Bethnal Green but returned in October to stop Georgia’s Zurab Noniashvili in the eighth round.
The Zimbabwe-born fighter is rated as one of the brightest prospects in the British heavyweight division.
Chisora said: “Baker’s going to be tough, but I’m ready to knock him out and show I’m the best in Britain. I’m disappointed that I won’t be fighting for the British title against Williams, but Frank has worked hard to make sure this fight is an eliminator for the Lonsdale belt. I’ll get my hands on it later this year and having to wait now will make it all the sweeter when I finally get to lift it.”