The AP reports: Kevin Garnett had 14 points and nine rebounds, Ray Allen scored 12 points and the Celtics tuned up for the start of their NBA title defense with a 101-90 win over the Knicks on Tuesday night… Eddie House led the Celtics with 20 points. Leon Powe added 19 points and 12 rebounds as Boston’s big men overwhelmed an undersized New York lineup… Nate Robinson scored 25 points and Stephon Marbury had 14 for New York.