Before Friday’s game, Celtics  coach Brad Stevens  said any success on the upcoming road trip would rely on his team’s ability to play defense  against some of the elite teams of the Western Conference.
If Friday night is any indication, they could be in for a long trip.
Nicolas Batum connected on 4-of-9 from 3-point range and finished with 18 points while LaMarcus Aldridge added a team-high 27 points and 12 rebounds to pace the Blazers to a 109-96 win over the Celtics Friday night at TD Garden.
The Celtics held Portland to just 8-of-22 shooting in the first quarter but still trailed, 23-21, heading into the second quarter.
But the second quarter was a different story as the Blazers started extending the Celtics defense and took 10 3-pointers, making four. The Celtics stayed close, shooting 64.3 percent, making 9-of-14 from the field. Vitor Faverani had all nine of his points in the quarter as the Celtics trailed 57-51 at the half.
Another huge factor in the game was the early foul trouble of Kelly Olynyk. The rookie was whistled for his third personal foul with 4:39 left in the second quarter and picked up his fourth just 29 seconds into the third quarter.
“Unfortunately, Kelly got the Sully treatment tonight,” joked Sullinger after the game, referring to the foul trouble Sullinger had in his rookie season last year.
The rough defense continued in the second half as the Blazers outscored the Celtics, 33-27, in the third quarter, led by 11 from Aldridge. Portland scored the last six points of the quarter to take a 90-78 lead into the final quarter.
The Celtics made it a seven-point game early in the fourth on back-to-back threes from Jared Sullinger and Courtney Lee  but could get no closer. Sullinger led Boston with 26 points and eight rebounds in 36 minutes off the Boston bench.
Jeff Green  (14) and Jordan Crawford (11) were the only other Celtics in double figures.
After winning four straight to even their record at 4-4, the 4-6 Celtics have lost their last two – both at home – and now head out on the road for a three-game road trip that begins Saturday night in Minnesota against the Timberwolves . They play Tuesday in Houston before wrapping up the swing on Wednesday in San Antonio against the Spurs.
The Blazers improved to 7-2 on the season.