The move - revealed on the day Sheffield United lost their High Court battle over the Premier League's failure to deduct points from West Ham - will place extreme pressure on chief executive Richard Scudamore. The League are so far refusing to sanction the £35 million transfer of the Argentina striker who rescued West Ham from relegation last season.
Tevez will fly to Manchester on Tuesday for a medical at Carrington the following day. It's also reported that West Ham and Manchester United have been in close contact and their discussions suggest a deal can be agreed.
A source close to the deal said: "United would not have put themselves in this position if they did not expect the deal to go through.
"Tevez will arrive as planned and if anyone wishes to stop that they will need to find a legal argument to do so."