PHILADELPHIA (AP) -- Paul Pierce scored 21 points, Rasheed Wallace had 20 and the Boston Celtics remained unbeaten with a 105-74 victory over the Philadelphia 76ers on Tuesday night.

The Celtics improved to 5-0 even without the usual standout performances from Kevin Garnett and Ray Allen.

Allen didn't score his first field goal until the third quarter and had five points. Garnett made just one basket on seven shots and scored three points when he was yanked with the game out of hand.

Wallace was about the only Celtic who had his normal night, even getting whistled for a technical foul for arguing with the refs in the third quarter.

Andre Iguodala led the Sixers with 17 points. Philadelphia missed 15 of 16 3-point attempts.