The Swede has been the subject of glowing appraisals and is tipped to go to the very highest reaches of the game - an opinion Foster shares.
“He is brilliant," the 35-year-old told the Watford Observer. “Pontus has a massive chance, a really, really good chance.
“He has the technical ability and somebody like Pontus just needs to play games now.
“As a goalkeeper he is brilliant and I was nowhere near as good as him When I was 19. I was going out on loan to Stafford Rangers.
“Couple his quality with the fact he is super professional, and it is nice to see."