Just 1 per champ . It can be a win prior to or after or in between winning titles. 1. Dempsey - vs Willard 2. Tunney - Dempsey 1 3. Louis - vs. Busy Baer 2 4. Marciano - vs Walcott 2 5. Patterson - vs Johannson 3 6. Liston - vs Williams 1 7. Ali - vs Williams 8. Frazier - vs Ali 9. Foreman - vs Norton 10. Holmes - vs Cooney 11. Tyson - vs Spinks 12. Holyfield - vs Bowe 2 13. Lewis - vs Tua 14. Wlad - vs Byrd 2 15. Fury - vs Wilder 2 16. Usyk - vs Joshua 1
1. Dempsey - vs Willard 2. Tunney - Dempsey 1 3. Louis - vs. Schmeling 2 4. Marciano - vs Walcott 2 5. Patterson - vs Johannson 2 6. Liston - vs Williams 1 7. Ali - vs Terrell 8. Frazier - vs Ali 1 9. Foreman - vs Frazier 1 10. Holmes - vs Cooney 11. Tyson - vs Spinks 12. Holyfield - vs Bowe 2 13. Lewis - vs Golota 14. Wlad - vs Chagaev 15. Fury - vs Wilder 2 16. Usyk - vs Joshua 2
1. Dempsey vs. Willard 2. Tunney vs. Dempsey 1 3. Louis vs. Schmeling 2 4. Marciano vs. Walcott 2 5. Patterson vs. Johannson 2 6. Liston vs. Patterson 1 7. Ali vs. Liston 2 8. Frazier vs. Ellis 1 9. Foreman vs. Frazier 1 10. Holmes vs. Leon Spinks 11. Tyson vs. Michael Spinks 12. Holyfield vs. Douglas 13. Lewis vs. Rahman 2 14. Wladimir Klitschko vs. Rahman 15. Fury vs. Wilder 2 16. Usyk vs. Joshua 1
