United reach Fifth Round thanks to Hernandez winner.

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Southampton 1-2 Manchester United
The FA Cup sponsored by E.ON
Fourth Round Proper
5.30pm, Saturday 29 January 2011
St. Mary's Stadium, Southampton FC
Live on ITV
Winning clubs will receive £90,000 from The FA's prize fund
Full list of Fourth Round results

A much-changed Manchester United side had to come from behind against Southampton to avoid being knocked out of The FA Cup sponsored by E.ON by a League One side for the second season running.

Sir Alex Ferguson's side was stunned by Leeds in Round Three last year - and they were set for another upset this year when Richard Chaplow fired Southampton into a 1-0 lead just before half-time.

But, with first-choice strike pair Wayne Rooney and Dimitar Berbatov watching from the bench, United's replacement frontline of Michael Owen and Javier Hernandez scored within ten minutes of each other to turn the tie on its head.

Southampton started the brighter, and Dan Harding almost ensured that Anders Lindegaard's first meaningful touch in English football would be picking the ball out of the net. But, luckily for the debutant goalkeeper, the linesman's flag was up when Harding slid the ball past him in the seventh minute.

Owen then twice threatened the Southampton goal. First he curled a low strike just past one post, then struck the other one with a looping cross which deceived goalkeeper Bartosz Bialkowski.

Southampton's Giuly Do Prado wasted the best chance of the first half after a sublime cross from Danny Butterfield which dropped over Chris Smalling's head. But Do Prado completely mis-timed his free header, nodding it well over the bar from six yards out. The Brazilian's embarrassment was short lived, however, with Southampton taking the lead within a minute of the miss.

Chaplow, running at pace, plucked Jonny Evans' clearance out of the air with his knee, surged into the area and drilled an unstoppable strike past Lindegaard.

Ferguson did not hesitate to make changes, using all three of his substitutes before the hour-mark. And, like they did at Blackpool last Monday, the manager's substitutions had the desired effect with United getting back on terms almost immediately.

When Gabriel Obertan's low cross was deflected into Owen's path, the striker instinctively headed it into the bottom corner.

And the comeback was complete with 15 minutes left when Hernandez latched on to an excellent through-ball from substitute Ryan Giggs before finishing with typical composure to put his side into the last 16.

Southampton
24 Bartosz Bialkowski, 12 Danny Butterfield, 6 Jose Fonte, 19 Danny Seaborne, 3 Dan Harding, 26 Alex Oxlade-Chamberlain, 4 Morgan Schneiderlin, 30 Richard Chaplow (27 Oscar Gobern, 84), 11 Giuly Do Prado (32 Dany N'Guessan, 80), 7 Rickie Lambert, 9 Lee Barnard (5 Ryan Dickson, 73)
Substitutes not used 1 Kelvin Davis, 2 Frazer Richardson, 17 Aaron Martin, 29 Ryan Doble

Manchester United
34 Anders Lindegaard, 22 John O'Shea, 23 Jonny Evans, 12 Chris Smalling, 20 Fabio da Silva (6 Wes Brown, 46), 28 Darron Gibson (11 Ryan Giggs, 58), 8 Anderson (17 Nani, 58), 18 Paul Scholes, 26 Gabriel Obertan; 14 Javier Hernandez, 7 Michael Owen
Substitutes not used 29 Tomasz Kuszczak, 9 Dimitar Berbatov, 10 Wayne Rooney, 33 Bebe

Referee Martin Atkinson

Attendance 28,792