Hornqvist took full contact in practice Saturday after missing Games 4 and 5 with an upper-body injury. He joined the Penguins' optional morning skate Friday, but wore a no-contact jersey, after skating on his own the previous day.
"It's obviously nice to be back with the guys," Hornqvist said. "Get bumped a little bit, and hopefully it'll keep going well today and I can play tomorrow."
Much of practice was devoted to the power play, which has gone 1 for 9 in two games without Hornqvist this series. The Penguins were 0 for 5 Friday and allowed Flyers forward Valtteri Filppula to score a shorthanded goal that tied the score 2-2 at 18:15 of the second period.
Hornqvist returned to his normal spot as the net-front presence on the first unit Saturday. Forward Jake Guentzel and defenseman Kris Letang took turns filling in for Malkin with forwards Sidney Crosby and Phil Kessel, and defenseman Justin Schultz, making up the rest of the unit.
"[Hornqvist] is an important player for us," Sullivan said. "He brings so much passion to the rink every day. He just loves the game. He loves to be around his teammates. He loves to practice. He loves to play. It's contagious."
Fifteen of Hornqvist's 29 regular-season goals were scored on the power play, where he serves as the net-front presence on the first unit.
"It's not a great feeling to be outside of the lineup and watching. You get so nervous," Hornqvist said. "I thought we did some really good things [Friday] and we have to clean up some other things, but overall, I think we played a decent game."