The fledgling rapper - who was body slammed in a staged fight against Cena in October - says he will be victorious when he faces the WWE superstar in Miami on January 1.
Federline - the estranged husband of Britney Spears - said: "The real Kevin Federline never backs down from a challenge. Make all your jokes, because New Year's Day I'm the one who is going to be laughing. Oh yeah, Cena, my name is not K-Fed, it's Kevin Federline, b***h, and I want some and I'm gonna get some." Federline, 28, took part in some staged WWE fights this autumn and visited Washington DC's Verizon Center to watch a wrestling match on Monday night (18.12.06).
He made his bragging statements to the Washington DC crowd as he promoted his upcoming fight.
Champion Cena is 6ft 11ins and 240lb.