Villa fell to a 3-1 defeat against the French champions in the first leg of their quarter-final tie on Wednesday (09.04.25) but the manager is confident that they can recover in next week's second leg with the backing of their supporters at Villa Park.
Emery told TNT Sports: "We will play at home next week and it will be a huge challenge for us, but we will feel strong at home with our supporters at Villa Park.
"We believe in our supporters, we believe in Villa Park and that the players can get the best performance next week."
Emery did acknowledge that his team must improve on their attacking performance if they are to stand any chance of reaching the last four.
He said: "Today, we needed to be disciplined in defence and even when we were losing 2-1, we had three approaches in their box.
"In the first half, we had three or four chances to get in their box, maybe only one chance to score. We needed to be clinical and we were in the first half, not in the second."
Morgan Rogers put Villa in front during the first half and also believes that there is plenty to play for in the return leg.
He said: "[There is] loads of belief in the changing room. We’ve got nothing to lose. No one had us to win the tie in the first place, so why not just go for it?
"That’s the mentality I have, that’s the mentality everyone has and the manager as well.
"We’ve got to just keep going for it and keep believing that we can do it and see where it takes us, but we’ve definitely got the quality to turn it around so it's not done yet."