[Freedom.]

Has any heavyweight champion in history taken as many "0"s as Wladimir Klitschko?

Wach
Chagaev
Ibragimov
Brock
Peter
Castillo
Vujecic
Shaheed

And Wladimir defeated a lot of opponents who had only one previous loss:

Haye
Thompson
Chambers
Byrd
Barrett
Shufford
Bostice
Meza
Weida
McIntyre
Koch
Wolfgramme

I realize some of those guys like Shaheed on the first list and Meza on the second list were not very good, but it's still impressive for any boxer to defeat so many opponents who hadn't lost before or had only one loss.