The Bhoys obviously struggle to keep hold of their star players, especially when they decide it is time to try their luck south of the border.
Eventually, the time might come where Celtic find it impossible to keep the Scotland international. However, he only signed a new deal last summer and is under contract until 2021.
Celtic can, therefore, stay strong and keep the player at Celtic Park over the winter. If a big offer comes in next summer, then it might be a different story.