Virginia (11-4, 3-2 ACC) gave up a total of 12 three points after combining 14 in his first four ACC games.
Syracuse (9-7, 2-3) scored more points in extra time (20) than in the entire second half (19). Striker Elijah Hughes, who started a 9-0 63-second run with three hands from which the Cavaliers never recovered, gave the Orange a 40-second advantage in extra time.
"They shoot from deep," said Cavalier's coach Tony Bennett. "You are one of the more dangerous three-point shooters you will compete against and there was a screen with balls a few times too late and we were too late so there are a number of things.
"Some of us, some of them, which is good for them that they only got a few shots."
Center Jay Huff led Virginia 16 points 7-on-12, but broke 2 to 7 from the free-throw line and committed four of Cavaliers' 15 sales. Point Guard Kihei Clark added 13 points, but also had four sales and only shot 4 for 14.
Virginia shot a total of 31.3 percent, made only 7 out of 31 points from the three-point range and had the second lowest points this season (43) through regulation. In their season opening win against Orange on November 6th in the Carrier Dome, the Cavaliers only scored 48 points, but still managed a 14th win.
Syracuse, who won the John Paul Jones Arena for the first time since joining ACC in 2013, scored his fourth three-point in extra time when Buddy Boeheim, son of legendary trainer Jim Boeheim, expired a shot from a half-shot clock.
The Guard Joseph Girard III scored a game high of 19 points for Syracuse and went 5 to 11 points behind the bow.
"We tried to shoot threes, but it's hard to shoot threes against them," said Jim Boeheim of the Cavaliers, who played 26.5 percent of the ACC's miserly three-point defense. “We tried the first game. We were simply not prepared for this type of defense earlier this year. We were much more aggressive tonight. "
The Cavaliers had the opportunity to convince Clark with a clear shot from the three-point range, but the shot failed, and Virginia was unable to control the loose ball in time to try to despair when the buzzer announced amount of 14,133 sounded in front of the gate.
Braxton Key scored seven points and eleven rebounds, a game high while playing a third game in a row with a splint on his surgically repaired left wrist. He sustained an injury on November 24 that forced the senior guard forward to miss three games.
Key had led the Cavaliers to goals in each of the last three games, but ended Tuesday's loss to Boston College with his left hand in the last few seconds after strengthening in the fall.
One of the most encouraging signs that Key hadn't suffered any additional damage from the fall was about five minutes against Syracuse in the first half when he hit the lane through contact and went through a competitive layup.
However, officials waved off the basket and instead called for a foul on the floor that mocked the cavaliers' believers. Shortly after the sequence, Key went under and exchanged handshakes with his teammates on the bench without favoring his wrist.
The game was one of the few entertaining moments in an arduous first half, when the Cavaliers scored more sales (nine) than field goals (eight) than a lane violation and Huff missed all three free-throw attempts. including the front end of a one-and-one.
The biggest lead in the first half for both teams was six points and came when the Orange rose 17:11 after a 10-2 rise with Hughes, who lost three points in a row.
Virginia went in half at 24:20 and scored the second smallest points in the first half of the season. Purdue's lowest score in the first half was 69:40 on December 4 at the ACC / Big Ten Challenge, when the Cavaliers scored just 17 goals at last season's NCAA tournament.
"I thought we were just relaxing," said Virginia senior striker Mamadi Diakite about the negligent three-point defense in extra time. "And that is not a coach mistake. It comes from us, the players, and I know that we are young, but we just have to know that we have an advantage at home at this point.
“We have to take advantage of this and use it. We weren't smart enough to do that. "