The study is based on an analysis of the existing arbitration practice on the validity of the condition of pre-estimated losses and the proportionality of such losses, a reasonable assessment of expected losses, the use of the buyback option and its comparison with other institutions of contractual relations in football. A proportionally priced buyback option will balance the interests of the club and the player in a contractual relationship, as well as other clubs interested in the services of this player. It is presumed that such a condition is in the interests of both parties to the agreement. But in reality only the club wins.