Tottenham must take their 1-0 Europa League defeat by AZ Alkmaar as a "wake-up call" going into their "biggest game of the season", says captain Son Heung-min.
Spurs lost their last-16 first-leg tie in the Netherlands - through Lucas Bergvall's own goal - with a lacklustre performance, and their sole chance of silverware now hanging in the balance.
Ange Postecoglou's side created few clear-cut chances and were fortunate to have only a one-goal deficit to overturn in next Thursday's second leg at the Tottenham Hotspur Stadium.
"It's nowhere near where we should perform," Son told TNT Sports.