Former Soviet boxers , notably the 7-foot , 320-pound Nikolai Valuev and Ukraine 's Wladimir Klitschko , who won the International Boxing Federation title , temporarily held the four versions of the heavyweight championship .
Wladimir Klitschko
Ukraine
/people/person/nationality
PERSON
Nikolai Valuev
LOCATION
Ukraine
PERSON
Wladimir Klitschko