'Not sustainable' - Rooney voices Man Utd concerns after Newcastle
Wayne Rooney has expressed his concerns over former club Manchester United ahead of the January transfer window, as the Red Devils continue to pick up positive results in the Premier League without being fully convincing, according to their all-time top goalscorer Rooney. United returned to a top-six place after beating Newcastle United on Boxing Day but might need to add to their squad in January, claims the pundit.