#3 – The only performer Cena has never defeated: Kevin Federline

Remember Kevin Federline? Not many do these days. Maybe even Cena has forgotten about him. But the fact remains that K-Fed remains the only WWE performer to have a 100% win record vs the 16-time champion in 1 on 1 matches.
The American rapper and fashion model rose to stardom in mid-2000s after he married Britney Spears. And Vince McMahon, for the opportunist he is, took advantage of it and used K-Fed in a storyline with Cena.
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They had one match in the WWE ring and K-Fed picked up the win. Billy Gunn also has a 100% win record in televised matches but there are reports that he has been defeated by Cena in house-shows.
Rumours are that Christian is another one who has never lost to Cena but that is not true. The Canadian lost a singles match to Cena on Monday Night Raw in September, 2011.