The Oklahoma City Thunder defeated the Boston Celtics 127-123 on Tuesday in Oklahoma City, with Shai Gilgeous-Alexander scoring 36 points and Josh Giddey adding a season-high 23.

The Thunder’s winning run now stands at five games, while the Celtics’ six-game winning streak is over.

Kristaps Porzingis made an apparent corner 3 with less than four seconds remaining, cutting Oklahoma City’s lead to one.

But because Porzingis’ foot was on the line, the shot was deemed a two instead, and the Thunder led 125-123.

After being fouled off the inbounds, Gilgeous-Alexander sank both free throws to all but seal the victory.

Oklahoma City led by 18 with seven minutes remaining but Boston scored 10 straight points, paced by two 3-pointers by Derrick White, to come within eight with five minutes remaining.

However, after White assisted on Jayson Tatum’s alley-oop, Thunder rookie big man Chet Holmgren blasted a catch-and-shoot three from the wing to put an end to the Thunder’s run and stabilize the team.

But Boston fought back, trimming the Thunder’s lead to two points with 41 seconds remaining on another 3-pointer by White. Jalen Williams made a jumper in response, and Oklahoma City nailed four free throws to hold off the Celtics.

Porzingis led the way for Boston with 34 points and 10 rebounds. Tatum finished with 30 points, 13 rebounds, and eight assists, while White had 19 points.

The Celtics led by three at halftime, but the Thunder swiftly took control, shooting 16 of 26 (61.5 percent) from the field and 6 of 9 from beyond the arc as Oklahoma City beat Boston 40-25 in the third quarter.

Gilgeous-Alexander had 16 points and Giddey had 11.

Giddey has struggled for much of the season but has recently come on strong.

Giddey has averaged 18.3 points, 7.3 rebounds, and five assists in the last three games while shooting nearly 55% from the field.

Tuesday, Giddey had eight rebounds and six assists.

Oklahoma City shot 52.7 percent from the field, its fourth game in a row shooting 50 percent or higher. This was only the fourth occasion this season when an opponent shot 50% or higher against Boston.