Manchester United have told the FA Stuart Pearce cannot select any of their over-age players for the British Olympic team apart from Ryan Giggs, it can be disclosed.
In a telephone conversation with the FA the club ruled out Team GB coach Pearce picking Rio Ferdinand, Wayne Rooney, Paul Scholes and Jonny Evans for the Olympic tournament at London 2012 as over-23 players.
According to a 2008 court ruling, clubs have the right to refuse to release players for the competition as it is not on the international calendar, but United are only taking that position on their over-age players.
Tom Cleverley, Danny Welbeck, Phil Jones and Chris Smalling could be part of the Olympic squad if they are not picked for the England Euro 2012 squad.
It can be revealed that United boss Sir Alex Ferguson, who said on Thursday that striker Javier Hernandez will not be part of the Mexico Olympic team at the Games, will not stand in the way of Giggs being part of the Olympic squad as the 38-year-old has never played in a major international tournament.
Giggs has indicated he would accept an invitation - each squad are allowed three over-age players - so long as the Football Association of Wales did not oppose him doing so. Sources there have confirmed that while they are politically opposed to a GB team, they would not prevent Giggs taking part.
An FA spokesman refused to confirm whether they had received the letter from United.
The prospect of a row, or even a legal battle, looks unlikely however, especially given United's acceptance that young players not involved in Euro 2012 plus Giggs can be selected.
In relation to Hernandez, who had initially been selected as an over-age player for Mexico, United said they had agreed with the Mexican FA that the striker, who turns 24 on June 1, have the full summer off.
Ferguson told the club's website: "His form last season was fantastic. He's found the second year more difficult, but a lot of that is down to not having a summer break for three years and playing every summer for his country.
"Next year he will be fine as we have agreed with the Mexican Football Association that he is going to get the requisite rest that he needs to perform in the Premier League."
But Hector Gonzalez Inarritu, Mexico's director of the national teams, said that Ferguson has denied permission for Hernandez to participate.
Inarritu told a press conference: "Alex Ferguson denied Javier Hernandez's participation in the Olympic games."
He contrasted that with Carlos Vela, the Arsenal striker who has been on loan at Real Sociedad, who had asked for personal reasons not to not be called to any of the national teams.
Hernandez, nicknamed Chicharito, will still be involved in Mexico's two World Cup qualifiers at the start of June.
In 2008, the Court of Arbitration for Sport ruled that Barcelona, Werder Bremen and Schalke did not have to release their players for the Beijing Olympics.
After an appeal by FIFA, the clubs allowed their players - including eventual gold medallist Lionel Messi - to appear in the tournament.