The right to the exclusive services of sports performers is a valuable asset, in team sports, to the clubs which employ them and, in individual sports, to the agents, managers and/or promoters who act for them. This is most visible in professional football's market for players’ services where leading performers are currently ‘sold’ for many millions of pounds. The notion of players as assets is often reflected in clubs’ accounts and enhances clubs’ overall value. Of those clubs which are owned by publicly quoted companies the securing (or loss) of a star player can crucially affect the share price of the controlling company. In a more general sense a player's value to his club is reflected in his capacity to attract larger attendances, an increased volume of pre-season ticket sales and enhanced merchandising and marketing opportunities.