Washington Wizards guard John Wall (2) shoots in front of Boston Celtics guards Kyrie Irving (11) and Terry Rozier (12) during the first half of an NBA basketball game Wednesday, Dec. 12, 2018, in Washington. (AP Photo/Alex Brandon)
Washington Wizards guard John Wall (2) shoots in front of Boston Celtics guards Kyrie Irving (11) and Terry Rozier (12) during the first half of an NBA basketball game Wednesday, Dec. 12, 2018, in Washington. (AP Photo/Alex Brandon) Credit: Alex Brandon

Washington — Kyrie Irving scored Boston’s last 12 points, including back-to-back 3-pointers in the final 40 seconds of overtime to outduel John Wall in a point-guard showdown, and the Celtics extended their winning streak to seven games with a 130-125 victory over the Washington Wizards on Wednesday night.

With his team serenaded by “Let’s go, Celtics!” chants on the road, Irving even got his own “M-V-P!” chorus late, finishing with 38 points and seven assists. Marcus Morris added 27 points and nine rebounds for Boston, which played without Al Horford, Gordon Hayward and Jaylen Brown — its No. 4-6 leading scorers.

No matter how many players they were missing, and no matter how disjointed their offense looked for a half, the Celtics had too many interchangeable parts to get beaten by an opponent that has been inconsistent all season. Wall returned after missing a game with an aching left heel to pour in 34 points with 13 assists. But his seven points in OT weren’t enough to keep pace with fellow All-Star Irving.

The Wizards led, 123-122, when Irving made a 3 with just under 40 seconds to go, and after Wall tied it at 125, Irving hit another shot from beyond the arc — this one from 31 feet. That gave Boston the lead for good, because Bradley Beal (22 points; zero in OT) and Wall them missed 3s.

This sure was a close one: The clubs kept trading the lead and neither was ahead by more than three points over the final 10 minutes of regulation. Up 113-110, Boston opted to foul Beal on purpose with 13 seconds left, but that backfired, because after he made the first free throw, he missed the second — but grabbed the rebound and put it in for the tie.

Irving blew by Beal at the other end but missed a layup right before the buzzer, sending the game to an extra period. And then he really took over.

Down by nine at halftime, the Celtics turned things around in a hurry — although not before that deficit grew to 57-46 early in the third quarter.

Soon enough, Boston put together a 10-0 spurt, capped by a pair of free throws by Marcus Smart, to take the lead at 65-62 midway through the period. When Morris made a 3 and, after Washington turned over its inbounds pass, Terry Rozier sank another to cap a 27-9 run, suddenly the Celtics held their biggest lead at 73-66.

The lopsided third quarter ended with Boston ahead 84-77.

But the Wizards opened the fourth with an 8-0 run despite resting Beal and Wall, and when Markieff Morris — Marcus’ twin — hit a 3, it gave the hosts an 85-84 lead with about 9½ minutes left.

Horford sat for the third consecutive game — he’s expected to miss at least a few more because of an injured left knee — and Brown and Hayward were out because of illness.

The Celtics made only 19 of 50 shots in the first half, going 4 of 20 on 3-pointers, and managed a grand total of six assists during that time. No wonder the Wizards led by as many 10 during the first two quarters and were up 55-46 at the break.

Boston outscored the Wizards 38-22 in the third quarter, when the Celtics had 10 assists and shot better than 60 percent.

Nets 127, Sixers 124

Philadelphia — Spencer Dinwiddie scored a career-high 39 points off the bench and Allen Crabbe had 20 to lead Brooklyn over Philadelphia.

Joel Embiid had 33 points and 17 rebounds and Ben Simmons scored 22 for Philadelphia, which played without Jimmy Butler because of a strained groin.

Pacers 113, Bucks 97

Indianapolis — Thaddeus Young had 25 points, 11 rebounds and four assists, and Myles Turner added 23 points to lead the Pacers to their fifth straight win.

Indiana seized control early, never trailed and pulled within a half-game of the Central Division-leading Bucks.

Cavaliers 113, Knicks 106

Cleveland — Jordan Clarkson scored 28 points and a basket by Rodney Hood in the fourth quarter gave Cleveland a late lead as the Cavaliers defeated New York after squandering a 22-point lead.

Hood put the Cavaliers in front 107-106 with 23 seconds remaining after New York took a one-point lead on rookie Kevin Knox’s fast-break dunk with 32 seconds left.

Hornets 108, Pistons 107

Charlotte, n.c. — Jeremy Lamb hit a 22-foot jumper from the right wing with 0.3 seconds left, and the Charlotte Hornets rallied from a late 10-point deficit for a wild win over Detroit.

Kemba Walker finished with a game-high 31 points and had nine assists and eight rebounds for the Hornets.