Lucien Favre felt Borussia Dortmund panicked after falling behind against Tottenham and were heavily punished for their lack of focus in the Champions League at Wembley.
Bundesliga leaders Dortmund impressed in the opening 45 minutes of their European last-16 tie away to Tottenham, but they wasted numerous chances in a 3-0 first-leg loss in London.
Having been in a position of strength at the break, Dortmund's night quickly unravelled as Tottenham upped the tempo after the restart on Wednesday.
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Son Heung-min gave Spurs the lead before late strikes from Jan Vertonghen and Fernando Llorente sealed victory for the Premier League team.