The People says Buttner will be the first big casualty of David Moyes's managerial reign.
The defender has failed to impress when filling in for Patrice Evra and Moyes is ready to let him go.
Buttner was a shock capture by Sir Alex Ferguson in his final season at Old Trafford but seems to have blown his chance under Moyes.
Now the new United boss is looking to give Brazilian Fabio a run in the team when he rests veteran Evra and will make a further signing in January.
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