Portsmouth 1 - 4 Manchester United

Rooney hits treble in rout

Man Utd's Wayne Rooney celebrates his second

Wayne Rooney scored three as Man United gave new Portsmouth boss Avram Grant a rude awakening, dishing out a 4-1 thrashing. Ryan Giggs rounded it off with his 100th Premier League goal.

Avram Grant's reign at Chelsea ended with defeat on penalties to Manchester United and his first game in charge of Portsmouth saw Red Devils forward Wayne Rooney score two crucial spot-kicks within his hat-trick at Fratton Park.

Grant, who has taken over from Paul Hart and will be rubber-stamped as manager next week when paperwork is completed, could not have asked for a tougher opening game than against the Premier League champions but there was hope of a result when Kevin-Prince Boateng levelled, also with a penalty.

Sir Alex Ferguson served the first half of his two-match touchline ban for criticising referee Alan Wiley and he may ask why Mike Dean awarded Pompey their penalty - but he will have no complaints with the way Rooney wrapped up the points after the break. Ryan Giggs added the fourth late on.