The Red Wings have had injuries this season, but none would be as costly as this one if Henrik Zetterberg is out for any extended period of time. Zetterberg sat out Sunday's 7-1 loss to Chicago with a sore groin. And don't expect to see him tonight when Colorado visits Joe Louis Arena, either. "This is what I do know about groins," said coach Mike Babcock, who has had plenty of experience with this type of injury as a coach over the years. "If you missed today, you're probably not playing tomorrow." General manager Ken Holland termed Zetterberg "day to day." Zetterberg would obviously be a difficult player to replace. He's tied for the team lead in assists with Pavel Datsyuk with 24, and has eight goals. Zetterberg's 32 points trails only Datsyuk (35) for the team lead. The injuries, as has often been the case this season with the Red Wings, didn't end with just Zetterberg. Forward Mikael Samuelsson is hurt again. Returning after missing 19 games with a broken left index finger, Samuelsson lasted only until the second period before leaving with what the team called an upper-body injury. Samuelsson played 9 minutes 5 seconds and lasted 12 shifts (he left late in the second period), tying Datsyuk for a team-high four hits. Samuelsson will be re-evaluated Monday and looks questionable to play against the Avalanche. "We'll see how he feels like (Monday)," said Holland, who added Samuelsson is also day to-day. From The Detroit News: