Tottenham manager Mauricio Pochettino accused his players of not respecting the plan after they squandered a two-goal lead to draw 2-2 away to Olympiakos in their Champions League opener on Wednesday.
The visitors looked in control after 30 minutes following Harry Kane's penalty and Lucas Moura's superb strike, but Olympiakos hit back before half-time through Daniel Podence.
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Tottenham then conceded a penalty which Mathieu Valbuena converted in the 54th minute.