"I'm good," Durant told ESPN's Chris Haynes. "It's nothing."
Durant, who left the 110-97 victory in the fourth quarter, called it "a quick roll."
"It didn't completely turn," Durant told ESPN. "I'm fine."
Durant was checked by Warriors staff on the bench for several minutes before leaving the floor for the locker room shortly before the end of the game, which gave the Warriors a 3-0 lead in the first-round playoff series.
Warriors guard Shaun Livingston also sprained his ankle in the fourth quarter.
Warriors coach Steve Kerr said Livingston has looked a little worse but didn't sound overly concerned about either injury.
"Both sprained ankles," Kerr said. "But I think they'll be all right."
Livingston had 16 points in 20 minutes. He was 4-for-9 from the field and went 8-for-8 from the free throw line.
Durant, who missed six games near the end of the regular season because of a rib injury, finished with 26 points on 9-for-17 shooting in 34 minutes, including 1-of-6 from 3-point range.
The Warriors are already without Stephen Curry for the series because of a Grade 2 MCL sprain to his left knee suffered March 23.