Heavyweight boxing champ Tyson Fury, after saying he'd retire, wants to fight Derek Chisora

Tyson Fury, who claimed he was retired in April, has announced that he's returning to the ring.

The heavyweight champion's preferred opponent is Derek Chisora, whom he already defeated twice in lopsided fashion. There is no deal yet, with the sides seven figures apart on Chisora's purse, a source told ESPN.

«You're running, Derek, from the trilogy,» Fury, ESPN's No. 1 heavyweight, said on Instagram. «You call yourself war, you should call yourself chicken.

»I've decided to come back to boxing because I can be the first heavyweight world champion in history to have two trilogies. I'd always say I'd fight Derek Chisora at the end of my career."

The event is being eyed for December at Principality Stadium in Cardiff, Wales, a source told ESPN. Top Rank and Frank Warren have co-promoted Fury's last five fights, but this offer was extended by Goldstar Promotions, the company that handles Fury's meet-and-greets across the U.K., the source said.

The speculation was that Fury, 33, would return to the ring all along, but instead to pursue a fight for the undisputed heavyweight championship. Oleksandr Usyk defends his three titles in a rematch with Anthony Joshua on Aug. 20. A fight that pits the winner vs. Fury is among the biggest in all of boxing, so the focus on Chisora is a surprise.

Chisora, a fellow Englishman, ended a three-fight losing streak with a split-decision victory over Kubrat Pulev last month. The 38-year-old Chisora (33-12, 23 KOs) was outpointed by Fury in 2011 and stopped by «The Gypsy King» in Round 10 of their 2014 rematch.

Fury (32-0-1, 23 KOs) scored a sixth-round TKO of Dillian Whyte in April in London. Before that, he scored two consecutive victories over Wilder, concluding the rivalry with an 11th-round