Johnson, 34, went the full twelve rounds with Tyson Fury, losing on points in December 2012, and has since won one and lost one to push his career total to 29-4, with 14 stoppages.
The experienced American, like Chisora, has also taken former WBC king Vitali Klitschko the distance, although wasn’t as competative as the Briton when missing out on the world titile in 2009.
The two fomer Klitschko challengers will collide at the Copper Box Arena next month as Chisora warms up for possible WBO eliminator with Fury at an outdoor venue in the summer.
Chisora and his future opponent were both present in London today to talk up their potential rematch, which will take place after Fury battles tattooed Argentinian Gonzalo Omar Basile in his first outing since April 2013.
With opponents now signed and sealed for the UK’s top division rivals, the sense of expectation is beginning to grow for what is set to be a higher-profile affair than when Fury ended an out of shape Chisora’s undefeated record in July 2011.
Follow on Twitter @PhilDJay for tweets of upcoming news on WBN