At the end of June 2007, Tévez rejected a move to Internazionale, and his agent, Kia Joorabchian, stated that he was in discussions to stay with West Ham, as the player had settled into the Premiership and wanted to remain in England. Tévez replied that he would not make a decision until the Copa América wrapped up in July.
On 5 July, the Daily Mail reported that Tévez had agreed to join Manchester United in a deal worth £20 million, which was subject to an appeal from West Ham; West Ham said in turn that they would block any transfer unless they received a majority of the transfer fee. The next day, West Ham released a statement that Tévez was under contract until June 2010, in addition to denying having held negotiations with any other club. Joorabchian contradicted the claim by saying that West Ham had indeed given permission to United to engage in talks.
Manchester United and West Ham sought FIFA's assistance to rule on Tévez's ownership, but on 24 July, FIFA suggested that the case be referred to the Court of Arbitration for Sport. Joorabchian intervened by issuing West Ham with a High Court writ "...to compel West Ham to release the registration of Carlos Tévez in accordance with contracts entered into between the parties." However, the case never made it to court as the Premier League approved an agreement between West Ham and MSI, in which MSI would pay £2 million to West Ham, who in turn released Tévez from his contract.
From Wikipedia.