Dion Dublin knows what it is like to sit on the sidelines for extended amounts of time, watching his teammates go at it.
Dublin, who is involved in tonight's Oxfam Charity match between a Celtic XI and a Man Utd XI, said it was hard to get back playing at his best again and expects it will be a difficult task for Celtic left-back Emilio Izaguirre to fight back after going down with a broken ankle on the weekend.
"Medicine has moved on, so Emilio shouldn't be out for that long. It was quite innocuous, wasn't it? It wasn't a studs up, two-footed tackle. It was a bit of a strange one," Dublin said.
"The last thing he wants now is visitors. You just want to be left alone, to get over it mentally and physically, then you're eventually up to explaining to people how you feel.
"It's going to be difficult, after a good pre-season and having got himself fit, now it's come to an end. It is difficult to watch the rest of the lads training.
"That's all you want to be doing, that's your life. It should be the case that, no matter what fine you might get hit with over the years, taking the game away hurts even more.
"I think that is what has happened, without it being his fault. He's not going to want to see a five-a-side, the boys laughing and joking during a keep-ball session.
"He will be stuck in hospital, making lots of calls to his family and friends back home.
"In terms of getting your place back in the team, well it comes down to the person and what you want to achieve, and what your manager's plans are for you. I'm sure the manager still has plans for Emilio.
"But if somebody else comes in and does well, you've got to fight for your place. That's what it's all about."