Blackburn boss Tony Mowbray said his dressing room was "emotional" after Bradley Dack was stretchered off in the goalless draw with Wigan Athletic at the weekend.
It moved Rovers to within two points of the top six at the halfway stage of the season but the injury to 10-goal Dack overshadowed any result; he was stretchered off in severe discomfort after appearing to damage his knee when landing.
Nottingham Forest are due to face Blackburn at the City Ground on New Year's Day - a match which their talisman is almost certain to miss.
Mowbray said there were tears and that the injury "doesn't look good."
He said: "The treatment room attached to the dressing room is quite an emotional place to be honest, there's quite a few tears there.
"It looks like a bad injury. We need to get it scanned, which we will do as soon as we can.
"The players are all pretty emotional, as Bradley is emotional. He was in a lot of discomfort and a lot of pain.
"Let's wait and see what a proper diagnosis from the scan shows, but at this moment in time, it doesn't look good.
"Bradley Dack is the life and soul of our football club. On the training ground every day, he's like a kid in the playground.
"He wants the ball, always laughing and smiling, having fun, and it's not nice when you see the kid who brings the life to the training in tears. The players are also getting upset and shows the closeness of our group."
