The heavyweights will take center stage at UFC Fight Night from Croatia as Ben Rothwell looks for his fifth win in a row when he takes on former champion Junior Dos Santos.
Rothwell and Dos Santos hit the scale on Saturday at the official weigh-ins with both fighters looking fit and ready for action.
Rothwell came in at 264 pounds, just two pounds under the heavyweight limit while Dos Santos was trim at 241 pounds.
More from FoxSports
The co-main event featured a heated stare down that forced UFC officials to step in between them as Derrick Lewis stepped off the scale and charged towards opponent Gabriel Gonzaga.
Cooler heads prevailed but that matchup should provide some serious fireworks on Sunday.
All of the fighters made weight ahead of the Sunday show that kicks off on FS1 at noon ET followed by the main card at 2pm ET.
UFC Fight Night: Rothwell vs. Dos Santos
MAIN CARD (starts at 2pm ET on FS1)
MAIN EVENT: Ben Rothwell (264) vs. Junior Dos Santos (241)
Derrick Lewis (264) vs. Gabriel Gonzaga (262)
Francis Ngannou (252) vs. Curtis Blaydes (261)
Tim Johnson (262) vs. Marcin Tybura (247)
Igor Pokrajac (205) vs. Jan Blachowicz (205)
Maryna Moroz (115) vs. Cristina Stanciu (116)
PRELIMS (starts at 12pm ET on FS1)
Nicolas Dalby (171) vs. Zak Cummings (170)
Ian Entwistle (135) vs. Alejandro Perez (135)
Mairbek Taisumov (154) vs. Damir Hadzovic (155)
Filip Pejic (136) vs. Damian Stasiak (134)
EARLY PRELIMS (starts at 10:30 am on UFC Fight Pass)
Robert Whiteford (145) vs. Lucas Martins (145)
Jared Cannonier (241) vs. Cyril Asker (241)
Alessio Di Chirico (185) vs. Bojan Velickovic (183)