Craig Gordon believes it would need 'crazy money' to persuade Celtic to part with Callum McGregor.
The Scotland international is in the best form of his career, with English Premier League side Bournemouth credited with an interest after losing young midfielder Lewis Cook to a serious knee injury.
McGregor filled the void vacated in the middle of the park when Scott Brown was injured and Gordon believes the 25-year-old will be tracked by some the best teams in Europe after solidifying his reputation as a big-game player.
Asked if McGregor is now in the £20million bracket, the Parkhead goakeeper said: 'I don't know, it is crazy money now.