Boucher, who led the league with a 1.91 goals-against average last season, allowed 14 goals in his previous three starts, and was yanked in his last two starts at home.
After failing to stop several shots during a practice drill Wednesday, Boucher smashed his stick over the crossbar in anger.
"It really wasn't a big deal," Boucher said about the incident, which was replayed several times on a local television station. "I've broken plenty of sticks. Every goalie does it. For it to be a story, it was a real slow day. People think I'm a mental case. I'm fine. My head is fine."
The Rangers have lost five of their last six games.
"They locked up the middle of the ice very well," Rangers captain Mark Messier said. "They protected their slot very well and didn't allow any second or third chances."
Rick Tocchet also scored for Philadelphia, and Daymond Langkow added an empty-net goal.
Sykora, who spent the last two seasons in the Czech Republic, gave the Flyers a 1-0 lead 7:07 into the game when he one-timed a crossing pass from Paul Ranheim just inside the far post.
Sykora's last goal came on Nov. 8, 1998, when he played for Tampa Bay.
"Everybody zoomed to (Ranheim), and he put a perfect pass on my stick," Sykora said.
Boucher, who was the first rookie in 50 years to allow less thatwo goals a game, saw his GAA dip from 4.52 to 3.83.
He made a couple of nice stops in the final minutes when New York pulled its goalie during a power-play for a 6-on-4 advantage.
"The way we were playing, everybody should've broken a stick," Tocchet said.
Tocchet made it 2-0 by beating goalie Mike Richter with a backhander 5:21 into the third period.
Philadelphia outshot New York 17-9 in the third period. The Rangers entered the game with the league's best power-play unit on the road, but went 0-for-5 with the man-advantage.
"We were a little more aggressive," Flyers coach Craig Ramsay said. "It is a fine line. If you are too aggressive, you get caught for odd-man rushes, but we found a better balance."
The Flyers squandered a five-minute power play after Eric Lacroix nailed Justin Williams into the boards midway through the first. LaCroix was called for boarding and received a game misconduct.
Philadelphia's best chance on the power play came when Eric Desjardins hit the far post on a shot from the top of the circle. A penalty by Peter White wiped out two of the five minutes.
"My visor went up against the glass, and my I smashed my nose. I felt a little woozy," said Williams, who returned to the game after sustaining a minor cut to his nose.
©2000 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed