Giroux, hoping for a spot on Canada's roster for the 2014 Sochi Olympics, had a goal and an assist, four shots on goal and won 16 of 25 faceoffs -- including eight of 11 in the defensive zone -- in the Flyers' 6-3 defeat of the Detroit Red Wings on Wednesday.
Watching in person was Canada executive director Steve Yzerman, as well as Detroit coach Mike Babcock, who will reprise his role as Canada's Olympic coach.
Giroux was invited to Hockey Canada's summer evaluation camp but had to skip it while recovering from surgery to repair severed tendons in his index finger sustained in a summer golf outing. However, Yzerman told the Philadelphia Daily News on Wednesday that Giroux's absence from the summer camp wasn't being held against him.
"We would have liked him to come," Yzerman said. "But he was busy rehabbing. That's fine. That doesn't make a difference."