Iran coach Carlos Queiroz is being linked with a return to Manchester United.
Queiroz, who served as Sir Alex Ferguson's number two, claims he turned down the United job in the summer before they appointed David Moyes.
Troubled Moyes was expected to be given a stay of execution until the end of the season, but the Glazers may decide to act sooner.
The American billionaires have been left shocked by the rapid decline of the team this season.
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