Victory over Arsenal has United clear at the top of the table.
Vidic has warned Unitedâ€™s rivals: â€śWeâ€™ve only been warming up.â€ť
He said: â€śWe know we havenâ€™t performed as well as we can but from my experience here this is the time when we usually come into good form.
â€śIf we produce the kind of performances we know we can, we shouldnâ€™t have to worry about any of the other teams. This is the time of the season when the table is going to change quite a bit.â€ť