Rooney scored United's first in the 56th minute following a brilliant solid run followed by a powerful low shot past Scott Carson.

The home side doubled their advantage in the 69th minute after Rooney released Cristiano Ronaldo who found no difficulty in scoring.

United went three goals up when Bulgarian new signing Dimitar Berbatov scored his first goal for the club on 71 minutes after connecting with Luis Nani's cross.

The big win was wrapped up in the 90th minute after Rooney dished out another superb assist for Nani to tap in.