The Quadruple is on

Manchester United sealed an FA Cup fourth round date against Spurs with an easy win against 10-man Southampton. Danny Welbeck headed United in front in the 20th minute after John O'Shea's header was turned on to the bar by Southampton keeper Kelvin Davis.

Southampton's Matt Paterson then saw red for a wild lunge on Nemanja Vidic.

Nani scored from the spot after 48 minutes when referee Mike Riley harshly ruled David McGoldrick had handled, and Darron Gibson slammed home a third.

Sir Alex Ferguson's side will now face another date with their FA Cup nemesis Harry Redknapp, who ended their hopes in this competition at the quarter-final stage last year with eventual winners Portsmouth.

For Southampton, the whole day was an education for their emerging youngsters - although they also felt they were on the wrong end of several crucial refereeing decisions.

Southampton: Davis, James, Perry, Lancashire, Skacel, Smith (Holmes 69), McGoldrick, Gillett (Schneiderlin 56), Surman, Gobern (McLaggon 56), Paterson.
Subs Not Used: Forecast, Wright-Phillips, Euell, Molyneux.

Sent Off: Paterson (37).
Booked: Skacel, James.

Man Utd: Van der Sar, Neville, Evans, Vidic, O'Shea, Nani, Anderson, Carrick (Gibson 56), Giggs (Possebon 56), Welbeck (Rooney 63), Berbatov.

Subs Not Used: Kuszczak, Park, Rafael Da Silva, Fletcher.
Booked: Evans, O'Shea.
Goals: Welbeck 20, Nani 48 pen, Gibson 81.

Att: 31,901
Ref: Mike Riley (Yorkshire).