The France international admits that the Hammers will need to up their game if they are to stand any chance of beating the Red Devils but insists that "anything is possible"Alou Diarra insists that "anything can happen" in West Ham's FA Cup third-round replay against Manchester United.
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While the France international is under no illusions that West Ham will have to raise their game if they are to win at Old Trafford, Diarra insisted that an FA Cup shock is possible.
"It's not going to be easy in Manchester," Diarra told the club's official website. "They're in confident mood, even if they make a few changes. They have strength in depth and a lot of players and can rotate.
"For us, it's a question of raising our game in comparison to our performance at Sunderland and start the match just as we did in the home game.
"It's not an easy game but in the cup anything is possible. We'll have chances at Old Trafford."