PHILADELPHIA -- The Boston Celtics had been undefeated when Rajon Rondo notched a regular-season triple-double, ringing up a 13-0 record when that happened.
Rondo made it 14 triple-doubles Friday against the Philadelphia 76ers, but Boston dropped a 95-94 overtime decision at the Wells Fargo Center.
Rondo tallied 16 points on 8-for-14 shooting, to go with 13 rebounds and 14 assists. Paul Pierce added a game-high 27 points for Boston.
Evan Turner led the Sixers with 26 points and 10 rebounds. Thaddeus Young chipped in 17 points and 12 boards.
Jeff Green buried a 3-pointer to give the Celtics a 94-93 lead in OT before Turner, who had been 1-for-10 from the field in the fourth quarter and overtime, hit a 14-footer for a one-point Philly lead with 3.9 seconds to go in the extra session.
Rondo's baseline jumper was off the mark at the buzzer.
Earlier, Kevin Garnett (17 points, 10 rebounds) made one of two free throws to tie the score at 87 with 1:11 left in regulation.
Turner made a driving layup after Pierce blocked his jumper to give Philly an 89-87 advantage with 49 seconds remaining.
After Garnett was unable to convert a tip-in and Jrue Holiday missed an 18-foot jumper, Garnett drilled a 20-footer from Pierce to tie the score with 7.7 seconds to go.
Turner turned it over at the other end, and Rondo's jumper hit back rim to force overtime.
Pierce had tied the score at 80 on a driving layup on a pass from Rondo with 5:47 remaining in regulation.
The game, which was televised nationally, remained close the rest of the way.
The teams play again Saturday night at TD Garden.
Turner scored seven points to key an 11-2 Philadelphia run to start the third quarter and give the Sixers a 57-52 lead after trailing by as many as seven points in the first half.
Rondo established himself right from the outset and had 10 points, eight rebounds and five assists by the end of the first quarter.
The Celtics, behind 15 first-half points from Pierce and 14 by Rondo, forged a 50-46 lead at intermission.
NOTES: The Sixers were without top bench scorer Nick Young (hyperextended big toe) for the third game in a row, as well as reserve Royal Ivey (strained groin). Center Andrew Bynum remains sidelined with bone bruises in both knees. ... The Celtics didn't have Avery Bradley (shoulder surgeries). ... Saturday's game will mark the 12th meeting between the two teams in less than nine months. They played seven times in the Eastern Conference semifinals, with the Celtics winning in seven, as well as twice in the preseason and then three times in 2012-13. "I like Doc (Rivers), but I don't want to have that steady a diet of socialization with him," joked Philadelphia coach Doug Collins. ... Rivers (smiling) on how competitive the Atlantic Division is this season after his team has won the last five division titles: "I liked it the way it was. It (stinks)."