Manchester United midfielder Darren Fletcher believes Sunday's match against Chelsea will be the biggest game of his comeback if he is selected.
Fletcher was troubled by a chronic bowel condition for over a year and has recently returned to action following an extended period on the sidelines.
The Scotland international has started just three games for United following his return, and he admits his involvement in the squad is an unexpected bonus.
"If selected, it would be the biggest game of my comeback. But either way, I am back a lot quicker than I expected," Fletcher said.
"Maybe I don't have the sharpness in my legs yet but I can react quicker because I have been in situations before.
"My legs are coming back. If you had said I would be in this position back in June and July I wouldn't have believed you.
"I always appreciated how fortunate I was. But after going through something like this, you appreciate it more without a shadow of a doubt."