• Captain critical of ‘sloppy’ Europa League display
• Ange Postecoglou: ‘We didn’t have the right mindset’

Son Heung-min insisted that ­Tottenham’s defeat by AZ in the Europa League must be a “wake-up call” for their hopes of winning silverware this season as Ange Postecoglou admitted his side did not have the “right mindset for an away game in Europe”.

Spurs managed only one shot on target in the first leg of their last-16 tie and Lucas Bergvall’s own goal handed the Dutch side a slender advantage for next week’s second leg in north London. In the second half, Son was replaced by Dominic Solanke, who was then forced off himself. The England striker had just returned from seven weeks out with a knee injury, but Postecoglou said he hoped the latest problem was just a knock.

If Ange Postecoglou was hoping that things might be different for ­Tottenham in the Europa League, then he was sadly mistaken. An abject ­display in which his side fell behind to an early own goal from the unfortunate Lucas Bergvall and then failed to lay a glove on AZ Alkmaar means the ­Australian’s chances of maintaining the proud record of winning a trophy in his second season at every club he has managed now rest on next week’s second leg.

The home side – who are known as the cheese heads – could have been out of sight after repeatedly finding holes in the Spurs defence had it not been for two excellent saves from ­Guglielmo Vicario, including one to deny the Tottenham academy graduate Troy ­Parrott in the first half. Even though Spurs have not even reached the quarter-­finals of this competition in five attempts since 2013, ­Postecoglou said ­beforehand that his players sensed an opportunity to win it now that some of them are back from injury. But the sight of Tottenham’s record signing, Dominic Solanke, limping off late with a ­suspected back problem on his return from seven weeks out with a knee injury potentially made it an even more disastrous evening for the head coach.