At the official weigh-in ceremony for UFC 325: Volkanovski vs. Lopes 2 held in Sydney, all fighters in the main event made it to regulation, ensuring that the main fights remain as scheduled. Two-time champion Alexander Volkanovski scored 144.5 lbs to defend his featherweight title against Diego Lopes, who reached 145 lbs, preparing for a rematch after their previous bout at UFC 314.
Co-main event contenders Dan Hooker and Benoît Saint Denis also met the 155.75 limit for the lightweight bout. Other fights under the card, including Rafael Fiziev vs. Mauricio Ruffy and Quillan Salkilld vs. Jamie Mullarkey, saw all fighters make weight seamlessly.
The negative note came from the final "Road to UFC" flyweight match, where Aaron Tau initially appeared to make weight, but after a second measurement without foreign objects he was recorded at 129 lb, four pounds over the limit, which resulted in the cancellation of his fight against Namsrai Batbayar due to irregularities. This situation has generated conversation between amateurs and experts about the use of scales and how these controls are handled in international events.