Duff is determined to put two disastrous years at Newcastle United behind him, but many feel Kevin Keegan will let him leave St James's Park if the price is right.
The Republic of Ireland international has failed to sparkle on Tyneside, and the fans will admit he has been a massive disappointment.
But his form has not been helped by a career-threatening foot injury last year and he admits he has failed to find his best form since a £5m move from Stamford Bridge.
Duff: "I've had a disastrous time because of injuries so it'd be nice to find my best form again. Things haven't worked out for me but I still wouldn't change anything. It's been tough.
"This time last year I was lying in a hospital bed and the surgeon said then it'd be a year before you feel remotely like your old self.
"And it's more or less a year to the day, so if there is a bonus to be had from this season, it's that this time last year I was worried about ever playing again. Now I am back playing.
"It's been great working with him (Keegan), particularly as a forward player. Just training with him every day and hearing his thoughts on different things is great.
"Obviously the gaffer was missing for a couple of days earlier in the week because he had go to meet the owners. I'm only going on what I saw on Match of the Day on Sunday night because he hasn't spoken to us about it and we're only going on what we read in the papers.
"Obviously, anything can happen up there, even at the best of times. But we just have to worry about ourselves and get on with it. As far as I'm concerned, the gaffer will be there next year."