The midfielder whose transfer fee is £30million is wanted by six Premier League sides.
Manchester City, Tottenham and Arsenal are all keen on the England Under-21 star. Everton Brighton and Southampton are also tracking Maddison, who has bagged 15 goals in his first full campaign with the Canaries.
The 21-year-old only made his Championship debut a year ago but could earn a nomination for the PFA Young Player of the Year.
Maddison’s current club Norwich are as well keen to hang onto the player and handed him a four-year deal worth over £13,000-a-week last June.