The manager told the Irish Examiner: "I don't want to stop the speculation. I want him to keep playing well and if an opportunity like that arises then who am I to stand in his way? Opportunities like that come once in a lifetime.
"It is just fantastic that people are talking about him in this fashion although I hope it is not short-termism. I want it to be for the long term. Short term, he is here with us and thriving.
"It is a shame that it has to take Champions League performances for everyone to sit up and take notice. It is brilliant for him, great recognition and testament to his talent that he is playing his club football in Scotland and he is knocking on the door for the England number one spot."