Leeds United boss Marcelo Bielsa admits the manner of their defeat at Manchester United is a concern.
Leeds were hammered 5-1 at Old Trafford on Saturday.
Bielsa said afterwards, "It was difficult for us to recover the ball and difficult for us to create danger. The succession of goals after we equalised we could not react.
"In general lines they were superior to us clearly.
"The succession of three goals in such a short space of time overcame us.
"To have lost the way we lost can't be described as just a blip."