AZ Alkmaar coach Arne Slot admits he was left upset by his players' collapse at Manchester United last night.

Both teams have reached the Europa League round of 32, though Slot was angry after their 4-0 reverse.

“An annoying phase after halftime? That is an understatement," snapped Slot, as United fired three goals home in the space if 15 second-half minutes.

"That may reflect the qualities of the opponent, but the most important thing is: you can play along nicely, but you can also give the game away in a few minutes.

“Now in the group phase the result is not that important, but in the knockout phase it is. If you then lose 4-0 and you still have a return leg...

“We came here to win, and we didn't succeed. But the disappointment is not that great, because we are in Europe."