Norwich manager Alex Neil says his side need to win "critical headers" after Wednesday's dramatic 4-3 defeat at Newcastle United in the Championship.
Newcastle fought back from 3-1 down to win with two goals in stoppage time.
"They worked as hard as you could possibly ask them to and it was honest when they tried to win the header and they've not won it," said Neil.
"I can't say anything negative about them other than the fact we just didn't defend our box well enough."
Neil believed Newcastle "didn't do anything out of the ordinary" in the early part of injury time, with the Canaries having gone for a back three late on in the game by bringing on Ryan Bennett.