A service level agreement (SLA) is an agreement between two or more parties and should clearly specify the roles and responsibilities of the parties to the agreement. Another influence of the case was the rules applicable to foreign players. Before making this decision, clubs from all over Europe were limited to the number of foreign players they could employ and could only play a maximum of three in European competitions.  FIFA said it was „disappointed“ by the judgment while Gordon Taylor said the decision would have a significant impact and „lead to a flood of foreign players“. to the detriment of our game.“  The verdict allowed a team to choose to play a team of 11 foreign players if it wanted to as was the case when Chelsea became the first team to do so.  Until 2007, the proportion of foreign players had reached 57% in England and Germany, compared to 39% in Spain and France and 30% in Italy.  The last team to be able to draw up a purely English starting list was Aston Villa, ten months before Chelsea`s purely foreign departure elf.  Section C1 of the FA Rules prohibits a contract player or his agent from speaking to other clubs or being approached by other clubs without the agreement of the player`s current club. Due to exchange rate fluctuations, the lists of the most expensive transfers vary depending on the currency used. Most high-priced transfers take place between associations in the euro area and/or the United Kingdom. The table below is based on euro values, but also displays values in pounds. Often, fees are not officially announced and the figures reported by the media may not necessarily be correct.
 In general, training at the football school (Academy) is free for a young player. This does not mean, however, that a club and a player`s parents cannot include a free education clause in the contract. We believe that this agreement may have the following elements: a preliminary contract is an agreement of a player and an agreement to proceed with his registration at a later date and became better known after the Bosman decision of 1995.  A club may sign a preliminary contract with a player while still at another club with which the player agrees to join the club at a later date, usually after the expiry of their contract with their current club. . . .