The Reds earned a 1-0 victory at Johan Cruyff Arena following an own goal from Nicolas Tagliafico and a resilient defensive display.
Sharing similar sentiments with Jürgen Klopp, Adrian expressed his delight at securing the important result after a tricky encounter with the competition's semi-finalists from 2018-19.
The Spaniard told Liverpoolfc.com post-match: "It was the best start to a new campaign of Champions League – getting the clean sheet on a difficult pitch like this one and the first three points.
"It's a big win, a massive one – three points in the Champions League and a clean sheet.