Haye: Vitali fight has been agreed
Haye entered retirement after his lop-sided loss to Wladimir in July 2011, before stepping back into the ring to knock out Dereck Chisora a year later.
Now the Brit insists he will only fight again if a bout with Vitali is on the table, which he claims is happening after negotiations between the two camps. The Ukrainian is yet to announce his next fight after beating Manuel Charr in September, but Haye claims the pair are set to meet.
"The fight has already been agreed," Haye is quoted as saying in the Sun. "It's not a slave contract. It is not as good as it was against Vitali's brother Wladimir but I don't expect that because I'm the challenger now.
"It is fair and it gives me a chance to get the [WBC] belt back."
The heavyweight showdown became a major possibility when the WBC lifted its ban on Haye in August, and the Brit has since attempted to anger Klitschko by criticising his fights and insisting he will not fight in the Ukrainian's homeland.
With home names such as David Price and Tyson Fury becoming established forces in the division, it had been mooted that Haye could put on another all-British battle, but he insists there is no chance of that happening.
"Fury should keep on talking because he isn't really fighting anyone at the moment," Haye said. "As for me fighting him? No. I'm only getting back in the ring for a Klitschko. No one else."