Sabri Lamouchi said his Cardiff City players "lost their minds" during a dreadful four-minute spell in which they conceded both goals in the 2-0 defeat by Norwich City.
Cardiff started the better of the two sides for the first 20 minutes or so, but Lamouchi said the Bluebirds "gifted" two goals to the Canaries which ultimately decided the tie.
"It's difficult to analyse the game. To start in this way, to disturb Norwich here, at home, in the first half an hour, we created and I think we deserved to score first," he said.