Gerald Henderson scored a career-high 35 points, going 12-of-12 in free throw attempts, as the Charlotte Bobcats snapped a 10-game losing streak on Tuesday by beating Boston 100-74.
Ben Gordon added 17 points and Josh McRoberts contributed 13 points and 10 rebounds for Charlotte, which had not won since February 19.
Jeff Green and Jordan Crawford each netted 14 points for the Celtics while Brandon Bass and Avery Bradley each added 10 points.
The Celtics, who rested playmaker Paul Pierce for the night and had only five points from star big man Kevin Garnett, have lost two of three meetings with the Bobcats this season.
The Bobcats, who had the worst season winning percentage in NBA history last season, also have the worst record in the NBA this season, at 14-50. The Celtics fell to 34-29.