David Haye has said that he wants one more fight before he retires, against Vitali Klitschko.
The Brit lost to Vitali's younger brother Wladimir in July and said at the time that he would hang up his gloves when he turns 31 in October.
However, Haye has made it clear that he is willing to put his gloves on one last time to fight the 40-year-old Ukrainian.
"I'll knock him out, I'll smash his jaw," Haye told German newspaper Die Welt. "Vitali, I'll fight you if you are man enough.
"It doesn't matter to me where I fight you, I'll fight you on the moon. He has my contact details, I'm waiting for him. No fight at heavyweight would generate more publicity than Haye against the old Klitschko.
"I am the most popular heavyweight on the planet and with me he will earn the most money."
Haye won 25 of his 27 professional fights, 23 of those by knock-out.
