The manager questioned his charges' approach to a tense stalemate at Old Trafford, while calling on them to show better against Young Boys
Manchester United manager Jose Mourinho suggested that his players lacked the heart to take three points from the weekend's Premier League fixture after being held 0-0 by Crystal Palace.
The Reds' uneven league form continued unabated on Saturday as they failed to break down the determined Eagles at Old Trafford.
United dominated possession but could not find a way past Wayne Hennessey, with the home crowd reacting with sporadic jeers at the final whistle.