Everything appeared rosy as the players went off for half-time in the Premier League encounter.
Leading 1-0 via Emmanuel Adebayor’s header on 18 minutes, we’d controlled long periods of the opening 45 minutes, created chances and deserved our lead.
But it all changed inside 10 seconds of the second half.
From the kick-off, Jack Colback pinged a pass between our defence for substitute Sammy Ameobi to race onto and finish past Hugo Lloris.
It was a huge blow and the visitors capitalised on the momentum change to grab the winner in the 58th minute though Ayoze Perez.
“We’re very disappointed and upset,” said Mauricio.
“The first half was very good. We deserved more, to score three or four goals, but that’s football and it was unacceptable how we started the second half.
“The goal changed everything. It changed the energy, changed us and changed them. They started to believe and play their game.
“It was difficult because our heads had gone and everything we spoke about in the dressing room was lost.
“We need to improve tactically and in our mentality and we need to be stronger.
“Now we need to be focused for Wednesday.”
We take on Brighton in the fourth round of the Capital One Cup at the Lane on Wednesday night (7.45pm).