What happened: Sean Strickland defeated Khamzat Chimaev by split decision in the UFC 328 main event on May 9 at Prudential Center in Newark, taking the UFC middleweight championship. Available fight reports and official UFC coverage show two judges scored it 48-47 for Strickland and one scored it 48-47 for Chimaev, with Strickland surviving Chimaev's early wrestling and winning a closely contested five-round fight.

Why it matters: This is a major title upset because Chimaev entered as a heavy and lost for the first time as a professional. The outcome reshapes the middleweight picture immediately and adds another marquee championship upset to Sean Strickland's title resume, while debate over the decision is already driving strong fan reaction.

What to watch: Watch for UFC confirmation on Strickland's first title defense and whether Chimaev stays at middleweight after the loss. The judging controversy and post-fight matchmaking will likely dominate the immediate fallout from UFC 328.