LOS ANGELES — JuJu Watkins scored 31 points, making 13 of 14 free throws, and No. 4 USC beat No. 23 Michigan 78-58 on Sunday night in the Trojans’ Big Ten home opener.at the Galen Center.

Watkins had five rebounds, seven assists, three steals and three blocks. Kiki Iriafen added 18 points for the Trojans (12-1, 2-0). The duo combined to score USC’s first 16 points in the fourth when the Trojans outscored Michigan 21-9.

Jordan Hobbs scored 19 points for Michigan (10-3, 1-1). Greta Kampschroeder added 14 and Olivia Olson had 11.

TAKEAWAYS

Michigan: The Wolverines have lost to all three ranked opponents they’ve faced so far this season.

USC: Iriafen was on the bench with four fouls before returning in the fourth. She scored the Trojans’ first eight points to stretch their lead to 18 points.

KEY MOMENT

With Michigan trailing by 10 points, Hobbs scored 14 straight points, including four 3-pointers in a row, to help the Wolverines trail 34-31 at halftime.

KEY STAT

The Trojans were 20 of 23 from the free-throw line, making 13 of 14 in the third when they trailed by two points before getting their lead back up to 10 going into the fourth quarter.