David Price is to fight Russia's Alexander Povetkin on the undercard of Anthony Joshua's March 31 world heavyweight unification title showdown against New Zealander Joseph Parker.
The English heavyweight, 34, has fought and won only once since being stopped by Christian Hammer 12 months ago, when he considered retirement before appointing Derry Mathews as his new trainer, and he has been presented with the chance to revive his career.
"It is a massive, massive chance for me and it has come from nowhere. I wasn't expecting an opportunity like this to appear so it was a no- brainer," said Price.
"It is a big ask for me to go out and win but upsets do happen. This fight has come at the right time for me and I have a belief that I am going to win."
Povetkin is the mandatory challenger to Joshua's WBA title, the champion is also defending the IBF belt and fighting for Parker's WBO championship at Cardiff's Principality Stadium - and defeated Hammer in December.
The 38-year-old is the mandatory challenger to Joshua's WBA title.
He is confident of victory and said he will then be keeping a close eye on the main fight later that night.
"I expect to put on a great performance. Then go on to fight the Joshua-Parker winner later this year," he said.
Povetkin's only loss in a 14-year professional career was to Ukrainian great Wladimir Klitschko, in 2013.