United hit by Jones injury blow
Jones suffered the injury in training earlier this week and was sent for a scan which has confirmed he requires an extensive period of rehabilitation.
A club statement read: Phil Jones has had surgery on a knee meniscus tear sustained in training that will require six to eight weeks rehabilitation.
It is desperate news for the 20-year-old, who is yet to make an appearance this season.
After an extensive break following Euro 2012, Jones suffered a back injury that prevented him playing any part in pre-season.
He missed Uniteds opening three Premier League games and the start of Englands World Cup qualifying campaign.