Matthews appeared to roll his ankle with 8:27 left in the second quarter and he did not return. The extent of the injury was not immediately known. The three-year NBA veteran was averaging 15 points, 2.8 rebounds and 2.5 assists going into the game.
Matthews is averaging 15.0 points on the season.
Matthews, averaging 15.1 points, also scored 28 in a loss to Milwaukee on Tuesday.
Matthews has hit 11 of 18 from 3-point range in his last two games.
Matthews hurt his leg and ankle, along with his left elbow, just before the All-Star break. But he's playing - and praying - through the pain, hoping to help push Portland into the playoffs. The Blazers need their affable shooting guard down the final stretch. He is averaging 15 points, 2.8 rebounds and 2.8 assists in 35 minutes each game.
He shot 8 for 11 from the field and has 39 points in two games since returning from an ankle injury.
Matthews, who is Portland's starting shooting guard, has been averaging 15.2 points and 2.8 assists in nearly 36 minutes per game this season.
Matthews rolled his right ankle in Friday night's loss to Utah and missed one game.
Matthews went 5 for 8 from 3-point range, where he's gone 56 for 139 (40.3 percent) this season.
Matthews had missed six of nine games and the previous four with a strained left hip.
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