USC (21-6, 8-6) at Arizona (25-3, 14-1)
Tip-off: 7 p.m.
TV/Radio: Pac-12 Network/710-AM
Update: USC’s difficult three-game stretch against three top-six teams concludes at No. 4 Arizona, perhaps the toughest test yet. The Wildcats sit atop the Pac-12 standings, have won 19 of their last 20 games and reeled off 20 consecutive victories at home. The last time the Trojans edged Arizona at the McKale Center was in 2008. ... Arizona is expected to bring back both junior center Dusan Ristic and senior guard Kadeem Allen, who missed extended portions of the Wildcats’ two-game road trip last week at Washington State and Washington.