After they coughed up an 18-point lead in the fourth quarter on Saturday, the 76ers spent two days talking about how to finish games the right way.

They didn't need to worry about that problem Monday night in a 105-87 loss to the Boston Celtics at the Wells Fargo Center. They were never in it after the first quarter, squandering a chance to take advantage of one of the rare winnable games on their schedule.

"It's a fact that you do lay an egg from time to time in the NBA over 82 games. And tonight we laid an egg," Sixers coach Brett Brown said.

The list of reasons why the Sixers (2-22) dropped their 13th straight game at home to begin the season is a long one, but it starts with their inability to stop Celtics forward Kelly Olynyk.

He scored a career-high 30 points in 31 minutes off the bench. The Celtics' bench outscored the Sixers, 61-31, including 12 points from former Sixer Evan Turner.

Not even one of Nerlens Noel's best performances could make a difference. Noel scored a career-high 19 points on 9-for-12 shooting. Noel, who said his ailing foot felt better and allowed him to be more active, also had eight rebounds.

"Nerlens was the shining light," Brown said. "This was his best offensive game. I thought he made some great plays at the rim, blocked shots."

The Celtics (8-14) came in on a three-game losing streak and had allowed more than 106 points per game this season. The Sixers couldn't expose those flaws.

They turned the ball over 15 times in the first half as the Celtics built a 57-38 lead. Their 23 turnovers in the game led to 32 Celtics points.

The Sixers' sloppiness led to a lot of easy buckets. They were outscored on the fastbreak, 25-1.

Aside from Noel, offensive help was few and far between. Michael Carter-Williams and Robert Covington each scored 13 points. Tony Wroten was scoreless in nearly 30 minutes and took just three shots.

"We turned the ball over too much early, and I thought that put us in a hole," Noel said. "We have to do a better job than that taking care of the basketball."

The Sixers actually led by 11-2 in the first quarter as Boston missed its first nine shots.

The Celtics quickly wiped out that advantage as Olynyk entered and scored 14 points. They went on a 10-0 run to take a 25-20 lead and never trailed again.

"I just couldn't identify any combination [off the bench] that was going to get it," Brown said. "We came out well, moving, running, playing, and then we made the subs."

Five Celtics reached double figures, including starters Avery Bradley (15) and Jeff Green (14). Brandon Bass added 14 as a reserve.

Turkish forward Furkan Aldemir didn't provide a spark in his Sixers debut. He had two points in nine minutes.

Shortly after Aldemir entered in the second quarter, Carter-Williams tried to find him on a behind-the-back pass far from the basket. Jeff Green stole it and was fouled on the clear path to the hoop.

Whatever excitement Aldemir's morning arrival brought to the Sixers had faded into the reality of another long, winless night.