Philadelphia, PA (My Sportsbook) - The Ottawa Senators try to draw within a game of advancing tonight when they take on the Philadelphia Flyers in Game 4 of their Eastern Conference semifinal series at the First Union Center.

With things tied at a game apiece, the scene shifted to Philadelphia on Tuesday and the Senators posted a 3-2 come-from-behind victory in overtime. Wade Redden's floating shot from the half wall made its way through a five-man screen and over the shoulder of goaltender Roman Cechmanek at 6:43 of the extra session.

The Senators rallied to win for the second time in this series, as Game 1 saw them erase a two-goal deficit before emerging 4-2. On Tuesday, Marian Hossa tied the match with a wraparound power-play goal 22 seconds into the third period, and Ottawa won a playoff game for the first time ever when trailing after two frames (1-22).

Captain Daniel Alfredsson also tallied for Ottawa, which carried the play in overtime and outshot the Flyers 7-2 in the extra period. Patrick Lalime finished with 20 saves.

For Philadelphia, John LeClair and Sami Kapanen both found the net, while Roman Cechmanek, who was brilliant in OT before being beaten by Redden, stopped 24 shots. Tony Amonte, who assisted on both goals, had a golden chance to win the game in overtime on a breakaway, but could not get a shot off after losing control of the puck.

The Flyers have now blown three games when leading this postseason, one against Toronto and two versus Ottawa. During the regular season, Philly made a habit of clamping down on teams when building an advantage. The team was 19-1-2 when up after a period, and 30-0-3-1 when ahead following two frames.

"The difference was when it was 2-1, we just weren't able to extend the lead," Flyers coach Ken Hitchcock said of Game 3. "We had lots of possession time, but we weren't able to generate any second opportunities."

Philly's inability to pile on the lead was partially due to its failure to capitalize on power plays, which the team had four of without success. Hitchcock's crew, which has a tendency to search for the perfect scoring chance as opposed to firing at will, managed a mere three shots during man- advantages.

"You have guys who are 6-foot-9 [defenseman Zdeno Chara] and 6-foot-5 checking the points," Hitchcock said of the Sens' penalty killers. "Those are big bodies and there are not a lot of openings there. It's just darkness."

Ottawa is first among remaining playoff teams in penalty killing, having allowed a mere three goals on 40 opportunities (92.5 percent).

And while the Flyers were failing on the power play, the Senators thrived. They had two opportunities and cashed in with two goals.

One thing that could start to become a factor in this series, if it already hasn't, is wear. The Flyers played a exhausting seven-game set with Toronto in the quarterfinals, while the Senators hardly broke a sweat in five games against the NY Islanders.

"I think the fact that they had a gruelling first-round series, that could be a factor," said Ottawa coach Jacques Martin, who was named a finalist for the Jack Adams Award Wednesday. "For us, we've had a lot of time off. I don't know if we took longer to get going [in this series], but I've liked that we're getting stronger. We've seemed more confident and more at ease with our play selection."

If Ottawa wins tonight, the team will be one victory away from advancing to the Eastern Conference finals for the first time ever.

Philadelphia, meanwhile, is in semi-survival mode for the second straight series, as the club fell behind Toronto two games to one as well. The Flyers are 4-0 after a loss this postseason.

Game 5 will be played Saturday afternoon in Ottawa.