PHOENIX (AP) — Kevin Durant went to the locker room with a sprained left ankle just before halftime of Tuesday’s NBA Cup game against the San Antonio Spurs and was later ruled out.

During the exchange, Durant rushed the floor, drove to the basket and attempted to cut between Spurs defenders Julian Champagnie and Devin Vassell. Durant stepped on Champagnie’s left foot as he stood up to take the shot.

Durant fell to the ground, landing flat on his back before immediately grabbing onto his left ankle. Teammate Ryan Dunn helped Durant get back to his feet when the officials whistled Champagnie for a foul on the play with 4:30 minutes left before halftime.

Durant stayed on the floor to connect on both free throws. Durant also knocked down a 14-foot jumper 22 seconds later before Royce O’Neale replaced him with 3:51 left in the first half. Durant went to the bench and didn’t return for the rest of the first half.

At that point, Durant had scored a game-high 13 points on 5 of 8 shooting, including 2 of 2 from long range, giving the Suns a 52-39 halftime lead.

Grayson Allen replaced Durant in the lineup to start the second half. Durant made a brief appearance on the court before heading back to the locker room.

The Suns announced midway through the fourth quarter that Durant would not be returning.

A 14-time NBA All-Star, Durant had already missed seven games due to a right calf injury, with the Suns posting a 1-6 record during his absence. Durant had appeared in Phoenix’s last four contests since returning Nov. 26.

The Suns entered Tuesday with a 10-2 record in games in which Durant played.