Garnett connected on 9-of-11 from the field, and Rajon Rondo provided seven points, nine rebounds and 11 assists for the Celtics, who fell to the 76ers in overtime Friday.
Thaddeus Young struck for 22 points for the Sixers, who lost for the third time in four games overall.
Evan Turner netted 13 points and Jrue Holiday finished with 11 and eight assists for Philadelphia.
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