Sevilla dominated proceedings against German side Monchengladbach, as they were given three penalties in a 3-0 win at home.
Emery believes his side deserved the penalties they got, as Gameiro and Banega converted two of three penalties, with Gameiro missing the third.
Sevilla have not had a good opening to their La Liga campaign, but were elite in the champions league opener.
The coach was full of praise for Sevilla afterwards, telling UEFA.com: “We are proud of the final result. We are becoming consistent and we are maturing. We got into dangerous positions, which is the reason we won three penalties.
“We will take it match by match and enjoy ourselves as well as trying to compete. This has been a big day for all Sevilla supporters.
“It is a great victory that gives us cause for optimism. It was very important to win at home in the first match, especially in a group where the favourites are Juventus and Manchester City.”