Couturier sustained a lower-body injury in the first period of Game 3 on Thursday, but did not look restricted in the morning skate Sunday, took line rushes in pre-game warm-ups in his usual spot, between forwards Maxime Talbot and Eric Wellwood.
Couturier, the eighth pick of the 2011 Entry Draft, has three goals and an assist in nine playoff games, but has developed into the team's best defensive center.
"Sean is an important piece of the team," Flyers coach Peter Laviolette said following the team's skate Sunday morning. "He looked good skating out there. He's smiling, that's always good."
Here's how the lineup will look when the puck drops about 7:30 p.m. ET:
When we started our journey we made a commitment to our fans to be relevant and to see the Chicago Blackhawks become the best professional hockey organization. There are not two finer symbols of that than Jonathan Toews and Patrick Kane. The commitment we have made to these incredible young men is equal to the commitment they have made to our team, our fans, our entire organization and the city of Chicago.
— Chicago Blackhawks owner Rocky Wirtz on signing Jonathan Toews and Patrick Kane to contract extensions