Tottenham captain Heung-min Son blasted his side's performance in their 1-0 defeat to AZ Alkmaar in the Europa League and says the result is a "big wake-up call".

Lucas Bergvall's own goal in the 18th minute earned AZ a deserved lead ahead of next Thursday's decider in north London.

An abject Spurs failed to muster a shot on target until the 88th minute, despite their hopes of salvaging the season effectively resting on the competition.

Son described the second leg as the club's biggest game of the campaign and says there are no excuses for Ange Postecoglou's side.

“This was nowhere near the level we should be in terms of our performance," Son told TNT Sports. "This is very disappointing, including from myself, and it is a big wake-up call ahead of the biggest game of our season next week. It is tough playing away from home in the Europa League. We were sloppy and not performing how we should.

“Everyone is disappointed and we have to look at ourselves. No excuses and it was nowhere near good enough. It is just 1-0 and the tie is not finished. Next week we have to be much better than we were tonight."

He added to SpursPlay: "We are going to have to move on. We have already passed this game and it was basically very, very poor. Luckily we have another chance to play at home and we can turn around again in a positive way. It is too early to let heads down and give up. We have a massive, massive chance next week and we need to be ready to try to turn it around.

"We should be lucky we have another chance next Thursday ... Every opponent you play you have to respect massively because it’s a hard competition and everyone wants to win. Everyone can talk [about] who is favourite but, at the end of the day,who wins is the most important thing.”