A late goal from Mexican striker Javier Hernandez secured a win for the visitors from England.
“The team was compact and takes another step in maturity and confidence. This match allows us to look optimistically at the future and we must continue to believe in the path we are on,” said Emery.
“I am satisfied with the work of the players and the support of the fans. We played to win the match and over 90 minutes we have been close and deserved to win. We created chances but did not score, but the important thing is to create them.
“Congratulations [to United] but we are satisfied with everything except the result. The team played well, there is nothing to criticise because we played to win and we must always have that mentality.
“The four remaining games are key, but the immediate rival is Glasgow Rangers, they will be two nice games. We can look ahead with optimism.”