Couturier did not participate in Wednesday's practice but skated Sunday morning and said he felt better.
"Like I said, we'll see (Sunday night), but I'm ready to go," Couturier said Sunday morning.
The 19-year-old suffered the injury in the first period of the Flyers' 4-3 overtime loss to the Devils in Game 3 after getting tangled up in the corner with New Jersey winger David Clarkson.
"I wanted to come back into the game, I just couldn't," Couturier said earlier.
In nine playoff games, he's recorded three goals and one assist.
Flyers coach Peter Laviolette said defenseman Andrej Meszaros (back injury) skated well in the morning, but general manager Paul Holmgren told reporters earlier that he would not play.
Meszaros, who had to undergo surgery on his back, hasn't played since March 1.
Mike Mazzeo is a frequent contributor to ESPNNewYork.com.