Villa had the lead before goalkeeper Marco Bizot was sent off before halftime. Then Newcastle took control to score three goals in the second-half to win 3-1.
“Firstly, I’m thankful for the supporters,” Emery said.
“It was really fantastic how they were transmitting their energy, we felt it. There were some fantastic moments when we started winning, we started in a good mood and good form.
“The players competed fantastic, but after we had the red card it was becoming more difficult in the second half.
“We continued competing and the supporters were helping us. We were being resilient, but when they scored their first goal, it was little bit more difficult.
“We tried but it was not enough. Newcastle is a really fantastic team, and they’re contenders in this competition.
“After we lost, with the circumstances we had with the red card, I think we must analyse this match and this competition and feel like we’re improving.
“Today, we’re not happy but I watched some things in the squad that can help us for the future in Europa League and Premier League.
“And the supporters with the energy they transmitted to us, we need it again next week against Leeds United.”