TORONTO — Kyle Lowry scored 32 points, Luis Scola had all of his 17 in the first quarter and the Toronto Raptors beat the Boston Celtics 105-91 on Friday night.

Lowry was 9 for 14 from the field, including 5 for 8 from 3-point range, and added five assists and four rebounds as Toronto led the entire way in its third straight victory.

Isaiah Thomas scored 20 points for Boston, who matched a season worst with its fourth straight loss. Even Turner added 12 points in the Celtics’ fifth loss in six games.

The Raptors, playing their fourth game in five nights, built up a big lead early, let Boston back in the game and then pulled away with a 14-2 run over the first five minutes of the fourth quarter. Lowry had 10 points during that stretch, punctuating the spurt with back-to-back 3s.

Lowry had three 3s and 15 points in the final quarter.

The Celtics had cut the Raptors’ lead to 79-74 lead going into the fourth quarter, outscoring Toronto 33-24 in the third on the strength of 12 points by Thomas in the period.

Toronto was up 55-41 at halftime. The Raptors led by as many as 19 but the Celtics had a 7-2 run over the final 2:47 of the second quarter. Thomas paced the visitors with eight points at the break.

The Raptors raced out to a 30-14 lead after the first quarter, shooting 55 percent from the field led by Scola, who was 7 for 9, including 3 for 4 from beyond the arc.

Boston’s 14 points were the fewest by a Toronto opponent in the first quarter this season.

The 14 points in the first quarter was the second-lowest total of the season for the Celtics, who scored 13 in the opening period against San Antonio in November.

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