Pierce shot 7-of-11 from the field and 3-of-4 from 3-point
The Bulls were led by reserve Tommy Smith's 13 points, and
rookie Loul Deng had seven points and five rebounds.
The Bulls scored just 13 points in the second quarter, and
Boston led 57-36 at halftime.
Rivers was hired by the Celtics in April. He went 171-168 in
five seasons with Orlando before being fired in November when the
Magic opened the season with one win and 10 consecutive losses.