Mauricio Pochettino bemoaned Chelsea’s profligacy following their shock 1-0 loss at Middlesbrough in the first leg of their Carabao Cup semi-final.

The Premier League side dominated at the Riverside Stadium but squandered a host of chances, with Cole Palmer particularly wasteful.

Hayden Hackney’s first-half goal earned the Sky Bet Championship hosts a slender advantage ahead of the return meeting at Stamford Bridge in a fortnight’s time.

‘Of course we are disappointed. It is the first half of the tie. We have another 90 minutes at Stamford Bridge and we have to be positive.

Mauricio Pochettino bemoaned Chelsea’s profligacy following their shock 1-0 loss at Middlesbrough in the first leg of their Carabao Cup semi-final on Tuesday evening

Hayden Hackney’s goal was the difference after Chelsea missed several huge chances

‘We made some mistakes and we were punished for that.’

Some of Chelsea’s travelling fans reacted angrily to the defeat at full-time.

‘If we assess the performance, overall we were the better side, we create more chances, we have clear chances,’ continued Pochettino.

‘But we didn’t score and we were not clinical and that has happened a lot this season – so many games we didn’t win because we weren’t clinical enough.’

Boro boss Michael Carrick said: ‘I thought the lads were exceptional, outstanding – effort, spirit was just off the scale, I’m just so, so proud of them. It was an incredible night.

Middlesbrough boss Michael Carrick was full of praise for his side and outlined his pride

‘Football’s about dreaming, things happen in cup competitions. Tonight shouldn’t probably have happened and we found a way to make it happen – the boys were incredible.

‘We’ll go down there with our eyes wide open and know what to expect but it doesn’t stop us from trying.’