With securing a place in Roy Hodgson's squad for the World Cup finals in Brazil the Celtic keeper's target, the training sessions at St George's and match against Denmark is so much more than a friendly gathering.
Forster is expected to be the subject of substantial bids from clubs in England and the Continent when the transfer window re-opens in the summer.
All of which means he could be playing his final matches for the Hoops as they close in on their third title in a row - the giant Geordie having been in goal for all of them.
However, Parkhead boss Neil Lennon believes the prospect of a place in the squad for Brazil is the only extra motivation spurring Forster on in the final 10 games of Celtic's season, not any notion of putting himself in the shop window. And, even with his 1215-minute league shut out record reaching its conclusion in the defeat at Aberdeen last week, Lennon is confident Forster will be as focused as ever every time he pulls on the gloves for the Hoops.
"Fraser has got plenty of motivation, hopefully a World Cup to look forward to," said Lennon.
"So, he must maintain his high standard to make sure he travels to Brazil.
"That's a huge incentive for him."
Lennon has been honest in his acknowledgement that Forster's form in the past couple of seasons - especially in the Champions League - has made him a definite target for other clubs who can provide a bigger and better domestic stage on which to showcase his talents and cement his place as an internationalist.
But Lennon remains very proud of the fact the 25 year-old managed to overcome the obstacle of playing in what is considered an inferior league to break through to the England squad.
And he revealed a chat about what they wanted to do in terms of his future, while the speculation about where Forster might go was at its peak, paved the way for the keeper's best-ever campaign.
"We spoke to him at the start of the season about our plans, and he was very comfortable with that," said Lennon.
"We have not had to speak to him since.
"I think Celtic has been good for him. We have given him that platform where he has progressed into the England squad.
"Regardless of what people might think of the Scotttish game, he has had to make plenty of saves.
"It is not just his Champions League form that has propelled him into the public arena down the road.
"He has got better very year. He's won trophies here, he has won Doubles and he's broken a clean sheet record.
"So, it's not as if he is standing idle for 90 minutes in a game then has had to make a save or two. He has had to make some big saves along the way."