Chicago's Gibson goes down with ankle injury

PORTLAND, Ore. (AP) Chicago's Taj Gibson sustained a left ankle injury in the third quarter of Friday night's game against the Portland Trail Blazers.

Gibson clutched his ankle and grimaced in pain before he was helped off the court. There was no immediate word on his condition from the team.

The 6-foot-9 forward was averaging 12.9 points and 5.9 rebounds going into the game.

The Bulls were already limited without Derrick Rose, who missed his fourth straight game with a sore left hamstring. Pau Gasol missed his third game with a left calf strain.

Chicago was also without starting guard Kirk Hinrich, who left Thursday night's 103-88 loss to the Sacramento Kings with a chest contusion. X-Rays were negative, but coach Tom Thibodeau said before the game that Hinrich was day-to-day.