CHARLOTTE, N.C. (AP) -- Raymond Felton scored 25 points, rookie
D.J. Augustin added 11 of his 20 points in overtime, and the Charlotte Bobcats stunned Boston 114-106 on Tuesday to continue the Celtics' sudden slide.

Beaten by their surprising nemesis for the second time in two seasons, the defending champions came undone in OT, and they've quickly gone from unbeatable to vulnerable.

After a team-record 19-game winning streak and an NBA-record 27-2 start, the Celtics lost for the fifth time in seven games, leaving battered, bruised and angry by Larry Brown's upstart Bobcats.

Paul Pierce scored 28 points, but had a key turnover in overtime. Ray Allen scored 20 points on 7-of-20 shooting for the Celtics.