"He is well on the way to being the best in the business but it will take a few years. He is a great goalkeeper and a great find for Celtic."
Bonner added: "When you are a top-class keeper or top-class player you will be linked with everybody, that is the nature of the game.
"The press will put him in the spotlight so players get used to that kind of stuff. When you are up there you are a commodity.
"But he will be concentrating on his game and will be back on the training pitch this week enjoying himself and looking to put things right."