Its Game 4 tonight with the Flyers hosting the Pittsburgh Penguins at Wells Fargo Center.  The Flyers made some line changes in advance of tonight's game, moving Jake Voracek back to the top line with Claude Giroux. Also, Jordan Weal skated alongside Valtteri Filppula and Michael Raff at Tuesday's practice, meaning Oskar Lindblom could be the odd man out.

Here are some things to watch for:

- Sidney Crosby (PIT): 171 career playoff points, 1 shy of tying Mario Lemieux (172) for most in Penguins history

- Teams that take a 2-1 lead in a best-of-seven Stanley Cup Playoff series hold an all-time series record of 334-145 (69.7%)

- 1st series where each game has been decided by at least 4 goals since the 1995 Conference Semifinals between the Sharks and Red Wings

- Flyers: lost 7 straight series when trailing 2-1 (last won: 2003 Conference Quarterfinals against the Maple Leafs)

- Sean Couturier (PHI): injured in a collision in practice Tuesday; leads Flyers with 3 points this postseason

- From ESPN Stats and Info

Penguins at Flyers, 7 ET on 97.3 ESPN, 973espn.com and the 97.3 ESPN mobile app. (Penguins lead series 2-1)