John Hartson believes Matt O'Riley is worth around £20m as a result of his impressive start to life at Celtic.
Russell Martin has long been an admirer of the central midfielder since his days with the player at MK Dons and was eager to bring him to Swansea City in January. However, the club's owners were not willing to sanction a move for the London-born 21-year-old.
O'Riley joined Celtic and has excelled since moving to Scotland. He helped Ange Postecoglou's side to win the 2021/22 Scottish Premiership title and went on to feature for Denmark's Under-21s for the first time.
