The appeal is scheduled for tomorrow and such is Kia Joorabchian's frustration with the Premier League after it blocked Tevez's £35m move to Manchester United that he is considering contacting the Sheffield United chairman, Kevin McCabe, to hand over key documentation. Joorabchian believes he has evidence that would prove damaging to the League and West Ham, Tevez's present club. He considered appearing as witness for the Blades at last month's arbitration hearing but decided against it.

Now Joorabchian feels he may have little choice but to become involved if Tevez is to win the right to move clubs. The Premier League claim the undertakings given to them by West Ham - that the striker was solely their player and that a side agreement did not exist - mean that they cannot cancel Tevez's registration and allow him to leave without keeping most of the fee.

Joorabchian argues that West Ham teared up the agreement he had with them - that Tevez was only on loan for a season - and that they had no right to him if they decided against using a £40m buy-out clause.

Sheffield United accept that there is no time for them to be reinstated to the top-flight but are demanding up to £50m compensation because West Ham were fined rather than deducting points over the controversial signings of Tevez and Javier Mascherano.

Privately, West Ham realise that they are in a mess over the affair, while the Premier League is threatening them with the possibility of a second inquiry. That would raise the prospect of a points deduction this season.

Joorabchian and Tevez have written to the club requesting that the player's contract, which West Ham argues runs until 2010, is cancelled. That has been rejected, as has one from Joorabchian to the Premier League for Tevez's registration to be handed to Manchester United.

The Premier League have also thrown out Joorabchian's argument that the deal to take Tevez to United is similar to the one brokered for Mascherano to move to Liverpool.

Joorabchian and United have appealed to the Football Association to intervene while Fifa, world football's governing body, may also have to get involved to try and break the stalemate. It would take a request from the FA for that to happen.

It is understood Tevez's camp - backed by Manchester United, who wanted to announce the deal last week - believe the Premier League can no longer act as independent arbiter in the case.

Yesterday, a Fifa spokesman said: "We have not received any official request from any of the parties involved so far."

Manchester United's lawyers have also argued that the Premier League has no right to dictate where transfer fees are paid. But that too has been rejected by the body whose chief executive, Richard Scudamore, has found himself under increasing pressure.

West Ham, who yesterday sold Yossi Benayoun to Liverpool for £5m, are continuing to plan for next season and have made inquiries about the Cameroon midfielder Achille Emana, who would cost around £5m from Toulouse, and Fenerbahçe's Stephen Appiah.