Danny Graham can pin a double decker bus - he'd be great signing for Celtic

Graham and Fletcher are both out of contract at the end of this month, and neither are likely to be offered a fresh deal at the Stadium of Light.

Both frontmen have been linked with a move to Scottish champions Celtic, though Fletcher insists he hasn't had any contact from the Glasgow giants.

However, he was quick to talk up the attributes of Graham, who is well known to new Celts boss Brendan Rodgers.

“He (Graham) would be a great player for them. We’re good pals, and I enjoyed my time playing with him,” said Fletcher.

“We always used to say he could pin a double decker bus, he can pin anyone. The bigger the defender, the more he wants to go out of his way to pin him as well.

"He played for Brendan at Swansea and Watford so he knows what he’s about. He’s a great player, a big strong lad who can finish as well.

“He had a hard time for goals at one point but strikers need to be playing regularly for their confidence and if you’re not high on confidence, it becomes hard, and starts playing on your mind.

"But I’ve watched him in training a lot and it won’t be a problem.”

Scotland international Fletcher has long been linked with a move to Celtic, but insists he hasn't had any contact with the SPL club - or any other side.

Instead, he will wait and see what offers he receives when he goes on holiday.

“It’s flattering for me to be linked with Celtic but it’s never happened,” he said. “I honestly don’t know. I’d love to sit and tell you where I was going because it would be better for me.

"I’ve not had much contact with anyone yet. I’ll sit down and think about it after this week and start picking up my phone when I go off on holiday. My wife will be worse than me for wondering where we’re going to be. I’m quite laid back, I’m used to moving around, but she isn’t.”

Fletcher spent the second half of the season on loan at Marseille after a shock switch to the French side, and says he wouldn't rule out moving abroad again once his Sunderland contract expires.

“Maybe a few years ago I would have said ‘Nah, I want to stay in England’ when I had a four-year contract with Sunderland," he added. "But now that I have experienced it I would actually be up for it, I would never say no now.

"A few years ago I would maybe have been intimidated to go to another country but I enjoyed it and I was at a massive club. It was a privilege to play for them (Marseille)."