(Source: Getty Images)The greatest upset in UFC middleweight title fight history belongs to Sean Strickland. Strickland (28-5) stunned the mixed martial arts world on Saturday as he claimed the 185-pound championship in a five-round decision over arguably the greatest middleweight ever in Israel Adesanya. The middleweight title fight headlined UFC 293 inside Qudos Bank Arena in Sydney.Going into Saturday, the biggest upset in middleweight title fight history belonged to Michael Bisping, who famously knocked out Luke Rockhold in a short-notice fight in 2016. Strickland's victory was far less probable, according to betting odds. And how he did it -- convincingly, for five rounds -- made it even more unbelievable. "Am I f---ing dreaming?" asked Strickland, who earned 49-46 scores from all three judges. "Am I going to wake up? Somebody hit me. Literally, never in a million years did I think I was going to be here. Izzy is a bad motherf---er. You don't fight a guy with that many highlight-reel KOs. The majority of my friends, he's beat pretty easy. I was even doubting myself."According to UFC Stats, Strickland out-landed Adesanya (24-3) in total strikes 111 to 97. He dropped Adesanya with a right hand in the opening round, becoming the first fighter to ever do so in the UFC. Even when Adesanya suffered a TKO loss to Alex Pereira in 2022, he never suffered an actual knockdown.