Parker's heavyweight world rankings vary from third to 11th depending on the organisation - rankings which are perhaps more impartial than Fury's, who ranks his own son Hughie in ninth.
Fury's top 10:
1. Tyson Fury 2. Wladimir Klitschko 3. Deontay Wilder 4. Luis Ortiz 5. Charles Martin 6. Alexander Povetkin 7. Joseph Parker 8. Kubrat Pulev 9. Hughie Fury 10. Andy Ruiz Jr