The three points moved the club into 10th position in the table and mathematically confirmed their spot in La Liga for next season.
"It was a good night for us. A good night for everyone involved with the club," he told reporters at a press conference.
"We knew it was going to be difficult because they needed the three points, but we were effective in possession and played some nice football. I thought we were far superior to them.
"The players deserve every success because they have put so much work in this season. It's been a difficult year, but it seems that now everyone's forgotten about what happened in November and December."
Celta have lost just one of their last five in the league.