Nico Mannion scored 23 points, Josh Green added 20 and Zeke Nnaji had 19 in No. 21 Arizona's 90-69 rout over Illinois on Sunday night.

Arizona (2-0) was good at both ends, shooting 56% while nabbing 14 steals. The Wildcats turned a tight game at halftime into a rout with a 17-2 second-half run behind Mannion, Green and Nnaji.

Nnaji made 9 of 12 shots, Mannion had nine assists and Green was 4 for 7 from 3-point range.

Illinois (2-1) was able to hang with the Wildcats in the first half of a high-level game with more than two dozen NBA scouts on hand.

The Illini went cold in the second half and struggled holding onto the ball, turning it over 22 times.

Ayo Dosunmu led Illinois with 15 points and Trent Frazier added 14.

Illinois made seven of its first eight shots and Frazier had eight points in the first 4 1/2 minutes.

Mannion matched him, scoring on a 3, a floater, a putback and set up Nnaji for a dunk with a baseball pass in traffic .

The offensive show continued the rest of the half. Frazier had 12 points and Illinois hit 15 of 27 shots.

Mannion had 11 points, Arizona went 16 for 30 and led 39-38 on Max Hazard's last-second 3-pointer .

Arizona tightened up on defense to start the second half and went on an early 8-0 run to go up nine.

Illinois answered with a 7-0 run, but Arizona's freshman took over and the Wildcats scored 15 straight points to go up 68-52.

Illinois went 5:11 without a field goal during the run and shot 10 of 26 in the second half.

Kofi Cockburn, Illinois's 7-foot freshman, finished with nine points and seven rebounds.

Illinois hosts Hawaii on Nov. 18.