Leeds created little throughout and managed just two efforts on target.
With this defeat coming on the back of 3-0 losses against Tottenham and Crawley, Leeds head coach Marcelo Bielsa said he was "worried" by his side's winless start to 2021.
"Of course it worries me, these are three games that we could have resolved in a different manner," said the Argentine.
"The game against Tottenham less, but the game in the cup and the one today leave me worried."
Bielsa's side remain 12th in their first season back in the top flight, having taking 23 points from their opening 18 games.