Both champions are heavier, but will it matter?
WBC heavyweight title: Deontay Wilder 231 vs. Tyson Fury 273
IBF eliminator: Charles Martin 254 vs. Gerald Washington 236.5
WBO super bantamweight title: Emanuel Navarrete 122 vs. Jeo Santisima 122
Sebastian Fundora 153.5 vs. Daniel Lewis 153
Subriel Matias 142 vs. Petros Ananyan 142
Amir Imam 141.5 vs. Javier Molina 141.5
Gabriel Flores Jr 132.5 vs. Matt Conway 132.5