The lack of perimeter defense had a lot to do with this setback.
The Wizards made 18 of 33 three-pointers, shooting 54.5 percent from that distance. The Sixers have given up 33 three-pointers in their last two games.
Point guard John Wall and reserve swingman Martell Webster were Washington's leading deep threats. Wall made 5 of 8 three-pointers and finished with 24 points. The first overall pick of the 2010 draft had made just 3 of 11 three-pointers in the Wizards' first three games. Webster made 4 of 7 threes and had 14 points.
"Like I said from the start, we pick the poison where we want to try to guard the paint," Sixers coach Brett Brown said. "You have a [27.3] percent three-point shooter [Wall] that comes in and has a hell of a game.
"Last game, Andre Iguodala came in and went bananas here. . . . That's where we hedged our bets and it hurt us."
Washington's win ended a five-game losing streak in Philadelphia. The Wizards' last win here was on Jan. 15, 2010.
Wall made three of his three-pointers in the third quarter. His second one proved to be a huge blow to the Sixers' comeback attempt.
A Spencer Hawes layup pulled the Sixers within 71-67 with 6 minutes, 29 seconds left in the quarter. Washington quickly called a timeout to regroup. Twenty-two seconds after play resumed, Wall drained a three-pointer to make it a seven-point game. In the fourth quarter, that lead ballooned to 17 points.
"They were doubling the post off of me after a while," Wall said. "I just had to be confident to knock them down, and tonight they went in."
The Wizards also had a huge post presence in Marcin Gortat.
The center, acquired in a preseason trade with Phoenix, finished with 19 points and 12 rebounds.
The Sixers wore black ribbons on their jerseys to honor Jeff Millman. The Sixers' former longtime equipment manager died of cancer Tuesday morning at 67.
Evan Turner led the Sixers with 24 points. Spencer Hawes added 23 points and 13 rebounds, while Michael Carter-Williams had 19 points and seven assists.
In addition to giving up a lot of open three-pointers, the Sixers committed 20 turnovers.
Sixers reserve forward Daniel Orton exited the game in the first half with right-knee soreness and did not return. Orton said he was fine after the game.
It was a different story for the perimeter defense.