College basketball's opening night delivered its first shock: UCLA knocked off No. 5 Arizona in Las Vegas, a statement win in a meeting of former Pac-12 rivals that immediately reshuffled early-season expectations.

The loss stings historically for Arizona — it's the Wildcats' first season-opening defeat in 20 years. It came despite a monster individual night from Ivan Kharchenkov, who poured in 38 points in the losing effort. The Bruins simply had more answers, and Yahoo Sports was already floating Final Four talk in the aftermath, with UCLA hoping its Las Vegas magic launches a big season.

For a program that has spent recent seasons chasing its championship pedigree, beating a top-five opponent on night one is exactly the kind of proof-of-concept win that travels. "It is a great time to be a Bruins fan," as Yahoo Sports put it from Las Vegas.

Elsewhere on opening night, No. 3 Illinois rolled in its debut, per CBS Sports' winners-and-losers roundup, as the sport's first full slate offered an early read on the national contenders. But the headline belonged to UCLA — and to an Arizona team that now has two decades of opening-night history broken and a long season to respond.