Aldridge has 21 points, 13 rebounds; Trail Blazers hand Boston its 8th straight loss, 112-104

Boston Celtics' Brandon Bass (30) defends against Portland Trail Blazers' LaMarcus Aldridge (12) during the first half of an NBA basketball game in Portland, Ore., Saturday, Jan. 11, 2014. (AP Photo/Greg Wahl-Stephens) (The Associated Press)

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Boston Celtics' Jordan Crawford (27) runs against Portland Trail Blazers after a steal during the first half of an NBA basketball game in Portland, Ore., Saturday, Jan. 11, 2014. (AP Photo/Greg Wahl-Stephens) (The Associated Press)

PORTLAND, Ore. – LaMarcus Aldridge had 21 points and 13 rebounds Saturday night as the Portland Trail Blazers handed the Boston Celtics their eighth straight loss, 112-104.

The Trail Blazers (28-9) rallied from a 10-point second-quarter deficit. Wesley Matthews scored 18 points and Nicolas Batum had 16. Damian Lillard and Robin Lopez each had 15 points. Lopez also had 13 rebounds.

The win kept Portland tied for first place with Oklahoma City in the Northwest Division.

Avery Bradley led Boston (13-25) with 25 points. The Celtics, who have lost 11 of 12, shot 62 percent during the first half, but only 34 percent after halftime.