Leeds manager Simon Grayson admitted his side were taught a lesson by Manchester United last night.
The West Yorkshire outfit approached their Carling Cup third-round tie at Elland Road with high hopes of repeating their 2010 FA Cup triumph over United.
Instead, the contest was over by half-time as the visitors raced into a 3-0 lead which they defended until the end.
"People don't see how hard Manchester United work and how powerful they are," said Grayson.
"They are playing at the top level because they have that fantastic desire to do it every week."