Leeds United forward Ross McCormack is anticipating a "difficult game" against Manchester United at home in the Carling Cup on Tuesday.
The Championship side host high-flying United at Elland Road in the third round of the competition with Sir Alex Ferguson's side strong favourites to win the encounter.
And McCormack admits that defeating the English champions is going to be far from easy, especially as they are unbeaten in their five Premier League matches so far this season.
"I think we have to go with confidence but not with over confidence," the 25-year-old told Sky Sports News Radio. "We have to go and we've got to work hard. Teams in the Premier League have tried and failed (to beat them).
"Hopefully the fans will come out in numbers and make it a hostile atmosphere for the Man United players.
"They are the best team in the country and they should probably handle the atmosphere. So it will be a difficult game."
"They are probably going to have the majority of the possession but we are looking to get behind the ball and get the numbers," added McCormack. "And hopefully we can play some sort of exciting game."
Simon Grayson's Leeds have made a slow start to their Championship campaign, picking up just 10 points from seven matches.
However, McCormack is confident that they can still challenge for promotion to the English top-flight.
"I think maybe 10-15 teams are in the same boat as us and thinking: 'why can't we have a go at promotion'," explained the former Cardiff City player.
"I think that on our day we are good enough to beat any team in this league.
"Right now at the moment we are not having too many of our days but that can change very quickly especially in the Championship when we play Saturday and Tuesday."