Arizona guard Allonzo Trier banged knees with a North Dakota State player Monday night and immediately went down. The McKale Center fell silent as the Wildcats' leading scorer and an All-American candidate writhed on the floor, clutching his left knee.
Trier returned later in the second half with an ice bag on his knee, but his injury put a damper on what was an otherwise dominant performance.
Trier added 15 points before leaving with the injury, helping lift No. 18 Arizona to an 83-53 rout.
The team announced Tuesday he is day to day with a bone bruise in his knee and will sit out practice Tuesday.
"It's scary as a player when you feel that in your knee,'' Arizona coach Sean Miller said. "I'm sure he'll have a bruise there and hopefully he's good for the long haul, and hopefully we get some good news.''
Information from The Associated Press was used in this report.