Tevez was ruled to have been ineligible to play at the end of 2006/7 campaign
Sheffield United have been granted a temporary injunction stopping West Ham appealing to the Court of Arbitration for Sport over the Carlos Tevez saga.
An independent tribunal ruled that Tevez was not eligible to play for West Ham at the end of the 2006-2007 season.
The Hammers want CAS to hear an appeal but Sheffield United claim the court does not have jurisdiction to do so.
West Ham have requested an appeal against the injunction, while United will seek a permanent order next year.
Tevez, 24, who now plays for Manchester United, was deemed by September's independent tribunal to have played a key part in the London's club's Premier League survival as the Blades were relegated in the 2006-2007 campaign.
"On the totality of the evidence, we have no doubt that West Ham would have secured at least three fewer points over the 2006/7 season if Carlos Tevez had not been playing for the club," the judgement read.
Sheffiled United are expected to claim up to £30m from West Ham, but this will be assessed at a future arbitration hearing in private.
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